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8/13/2019 Devices to Overcome the Limitations of Sight (Adik)
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INTRODUCTION
The eye has a wonderful function that we often take for granted. Right now you are able
to read these words on the screen. Through the eyes, you can also see colors, shapes,
textures, and movement. Your eyes do all of this.This section will describe the process
by which the eye turns light into sight. This process starts with refractionby the cornea
and crystalline lens as the rays enter the eye.Through accommodation, the lens varies
the amount of refraction, so that clear images are focused on the retina from objects
near or far away.Finally, photoreceptors interpretthe images falling on the retina, and
change light into vision.Hearing, auditory perception, or auditionis the ability to
perceivesound by detectingvibrations,changes in the pressure of the surrounding
medium through time, through an organ such as theear. Sound may be heard
throughsolid,liquid, orgaseous matter. It is one of the traditional fivesenses. The
inability to hear is calleddeafness.In humans and other vertebrates, hearing is
performed primarily by theauditory system: vibrations are detected by theear and
transduced into nerve impulses that are perceived by thebrain (primarily in thetemporal
lobe). Liketouch,audition requires sensitivity to the movement of molecules in the world
outside the organism. Both hearing and touch are types of mechanosensation.
http://en.wikipedia.org/wiki/Soundhttp://en.wikipedia.org/wiki/Vibrationhttp://en.wikipedia.org/wiki/Earhttp://en.wikipedia.org/wiki/Solidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Sensehttp://en.wikipedia.org/wiki/Deafnesshttp://en.wikipedia.org/wiki/Auditory_systemhttp://en.wikipedia.org/wiki/Earhttp://en.wikipedia.org/wiki/Brainhttp://en.wikipedia.org/wiki/Temporal_lobehttp://en.wikipedia.org/wiki/Temporal_lobehttp://en.wikipedia.org/wiki/Touchhttp://en.wikipedia.org/wiki/Touchhttp://en.wikipedia.org/wiki/Temporal_lobehttp://en.wikipedia.org/wiki/Temporal_lobehttp://en.wikipedia.org/wiki/Brainhttp://en.wikipedia.org/wiki/Earhttp://en.wikipedia.org/wiki/Auditory_systemhttp://en.wikipedia.org/wiki/Deafnesshttp://en.wikipedia.org/wiki/Sensehttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Solidhttp://en.wikipedia.org/wiki/Earhttp://en.wikipedia.org/wiki/Vibrationhttp://en.wikipedia.org/wiki/Sound8/13/2019 Devices to Overcome the Limitations of Sight (Adik)
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OBJECTIVE
To identify the latest gadgets that can be used to overcome yhe limitation of sight and
hearing.
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Devices to overcome the limitations of sight.
- Many devices or optical instruments have been invented to overcome our
limitations of sight.
- Magnifying glass, microscope, telescope, binoculars, periscope, ultrasound
scanning device, X-ray machine and Magnetic Resonance Imaging (MRI)
machine are afew examples of such devices.
Devices to overcome the limitations of sight.
http://www.google.com.my/url?sa=i&rct=j&q=binoculars&source=images&cd=&cad=rja&docid=ajHkNmcerbVFrM&tbnid=pSEfHIdXtm2KBM:&ved=0CAUQjRw&url=http://www.meatbeerbabes.com/stuff-guys-want/nikon-7216-action-8x40mm-binoculars/&ei=yZQZUcTGHoGbiQeUh4C4Bg&bvm=bv.42261806,d.aGc&psig=AFQjCNEC4UjD2vquLx933qTD2_5EmOXHow&ust=1360717371104600http://www.google.com.my/url?sa=i&rct=j&q=telescope&source=images&cd=&cad=rja&docid=WjAn9srPiAE-CM&tbnid=dM3yhfTjPnpN0M:&ved=0CAUQjRw&url=http://nowitssimplified.blogspot.com/&ei=X5QZUc60JMa0iQfpq4Bw&bvm=bv.42261806,d.aGc&psig=AFQjCNEC0k3d5dHD0OKpM125cjruTrQEuA&ust=1360717261913281http://www.google.com.my/url?sa=i&rct=j&q=magnifyingglass&source=images&cd=&cad=rja&docid=MkdPXzZHS74B4M&tbnid=PxkFWsxAg_l0-M:&ved=0CAUQjRw&url=http://www.100open.com/2011/10/how-diligent-is-your-due-diligence/magnifying-glass/&ei=-ZMZUYzcF-yfiAey8YDYAw&bvm=bv.42080656,d.aGc&psig=AFQjCNFNOhye-LhwOgEBx5-KhTaLy03Nxw&ust=1360717161878431http://www.google.com.my/url?sa=i&rct=j&q=microscope&source=images&cd=&cad=rja&docid=SVn_CYOo9PnAAM&tbnid=T0FybybjRsVcCM:&ved=0CAUQjRw&url=http://www.haines.com.au/index.php/vce-microscope-with-light.html&ei=i5MZUcqiCOmViQfay4H4AQ&psig=AFQjCNFQolhRTc9Khppee_3EwOPGaFsYiw&ust=1360717008683487http://www.google.com.my/url?sa=i&rct=j&q=binoculars&source=images&cd=&cad=rja&docid=ajHkNmcerbVFrM&tbnid=pSEfHIdXtm2KBM:&ved=0CAUQjRw&url=http://www.meatbeerbabes.com/stuff-guys-want/nikon-7216-action-8x40mm-binoculars/&ei=yZQZUcTGHoGbiQeUh4C4Bg&bvm=bv.42261806,d.aGc&psig=AFQjCNEC4UjD2vquLx933qTD2_5EmOXHow&ust=1360717371104600http://www.google.com.my/url?sa=i&rct=j&q=telescope&source=images&cd=&cad=rja&docid=WjAn9srPiAE-CM&tbnid=dM3yhfTjPnpN0M:&ved=0CAUQjRw&url=http://nowitssimplified.blogspot.com/&ei=X5QZUc60JMa0iQfpq4Bw&bvm=bv.42261806,d.aGc&psig=AFQjCNEC0k3d5dHD0OKpM125cjruTrQEuA&ust=1360717261913281http://www.google.com.my/url?sa=i&rct=j&q=magnifyingglass&source=images&cd=&cad=rja&docid=MkdPXzZHS74B4M&tbnid=PxkFWsxAg_l0-M:&ved=0CAUQjRw&url=http://www.100open.com/2011/10/how-diligent-is-your-due-diligence/magnifying-glass/&ei=-ZMZUYzcF-yfiAey8YDYAw&bvm=bv.42080656,d.aGc&psig=AFQjCNFNOhye-LhwOgEBx5-KhTaLy03Nxw&ust=1360717161878431http://www.google.com.my/url?sa=i&rct=j&q=microscope&source=images&cd=&cad=rja&docid=SVn_CYOo9PnAAM&tbnid=T0FybybjRsVcCM:&ved=0CAUQjRw&url=http://www.haines.com.au/index.php/vce-microscope-with-light.html&ei=i5MZUcqiCOmViQfay4H4AQ&psig=AFQjCNFQolhRTc9Khppee_3EwOPGaFsYiw&ust=1360717008683487http://www.google.com.my/url?sa=i&rct=j&q=binoculars&source=images&cd=&cad=rja&docid=ajHkNmcerbVFrM&tbnid=pSEfHIdXtm2KBM:&ved=0CAUQjRw&url=http://www.meatbeerbabes.com/stuff-guys-want/nikon-7216-action-8x40mm-binoculars/&ei=yZQZUcTGHoGbiQeUh4C4Bg&bvm=bv.42261806,d.aGc&psig=AFQjCNEC4UjD2vquLx933qTD2_5EmOXHow&ust=1360717371104600http://www.google.com.my/url?sa=i&rct=j&q=telescope&source=images&cd=&cad=rja&docid=WjAn9srPiAE-CM&tbnid=dM3yhfTjPnpN0M:&ved=0CAUQjRw&url=http://nowitssimplified.blogspot.com/&ei=X5QZUc60JMa0iQfpq4Bw&bvm=bv.42261806,d.aGc&psig=AFQjCNEC0k3d5dHD0OKpM125cjruTrQEuA&ust=1360717261913281http://www.google.com.my/url?sa=i&rct=j&q=magnifyingglass&source=images&cd=&cad=rja&docid=MkdPXzZHS74B4M&tbnid=PxkFWsxAg_l0-M:&ved=0CAUQjRw&url=http://www.100open.com/2011/10/how-diligent-is-your-due-diligence/magnifying-glass/&ei=-ZMZUYzcF-yfiAey8YDYAw&bvm=bv.42080656,d.aGc&psig=AFQjCNFNOhye-LhwOgEBx5-KhTaLy03Nxw&ust=1360717161878431http://www.google.com.my/url?sa=i&rct=j&q=microscope&source=images&cd=&cad=rja&docid=SVn_CYOo9PnAAM&tbnid=T0FybybjRsVcCM:&ved=0CAUQjRw&url=http://www.haines.com.au/index.php/vce-microscope-with-light.html&ei=i5MZUcqiCOmViQfay4H4AQ&psig=AFQjCNFQolhRTc9Khppee_3EwOPGaFsYiw&ust=1360717008683487http://www.google.com.my/url?sa=i&rct=j&q=binoculars&source=images&cd=&cad=rja&docid=ajHkNmcerbVFrM&tbnid=pSEfHIdXtm2KBM:&ved=0CAUQjRw&url=http://www.meatbeerbabes.com/stuff-guys-want/nikon-7216-action-8x40mm-binoculars/&ei=yZQZUcTGHoGbiQeUh4C4Bg&bvm=bv.42261806,d.aGc&psig=AFQjCNEC4UjD2vquLx933qTD2_5EmOXHow&ust=1360717371104600http://www.google.com.my/url?sa=i&rct=j&q=telescope&source=images&cd=&cad=rja&docid=WjAn9srPiAE-CM&tbnid=dM3yhfTjPnpN0M:&ved=0CAUQjRw&url=http://nowitssimplified.blogspot.com/&ei=X5QZUc60JMa0iQfpq4Bw&bvm=bv.42261806,d.aGc&psig=AFQjCNEC0k3d5dHD0OKpM125cjruTrQEuA&ust=1360717261913281http://www.google.com.my/url?sa=i&rct=j&q=magnifyingglass&source=images&cd=&cad=rja&docid=MkdPXzZHS74B4M&tbnid=PxkFWsxAg_l0-M:&ved=0CAUQjRw&url=http://www.100open.com/2011/10/how-diligent-is-your-due-diligence/magnifying-glass/&ei=-ZMZUYzcF-yfiAey8YDYAw&bvm=bv.42080656,d.aGc&psig=AFQjCNFNOhye-LhwOgEBx5-KhTaLy03Nxw&ust=1360717161878431http://www.google.com.my/url?sa=i&rct=j&q=microscope&source=images&cd=&cad=rja&docid=SVn_CYOo9PnAAM&tbnid=T0FybybjRsVcCM:&ved=0CAUQjRw&url=http://www.haines.com.au/index.php/vce-microscope-with-light.html&ei=i5MZUcqiCOmViQfay4H4AQ&psig=AFQjCNFQolhRTc9Khppee_3EwOPGaFsYiw&ust=13607170086834878/13/2019 Devices to Overcome the Limitations of Sight (Adik)
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1. Microscope
Instrument to magnify object such as virus.
Objective lens and eyepiece magnify image.Types- light microscope, electron
microscope
2. Magnifying glass
Limited magnifying power-10 to 15 times
Use to see small object.
Magnifying glass is convex lens.
3. Telescope
viewing distant objects -stars, planets , Moon.
Consists of two convex lenses- objective and eyepiece lens.
The image produced by the objective lens is magnified by theeyepiece lens.
4. Binoculars
Binoculars provide a stereoscopic vision of distant objects.
The parts of the binoculars and their functions are the same as those of the telescope.
Binoculars are actually a pair of telescope.
Use- watch horses running in a race
http://www.google.com.my/url?sa=i&rct=j&q=x+ray+machine&source=images&cd=&cad=rja&docid=62Unqz2cXsiumM&tbnid=ZJ1kVKjVFx--AM:&ved=0CAUQjRw&url=http://mayamedica1.en.busytrade.com/products/info/1936191/Makh50-50kw-High-Frequency-X-ray-Machine.html&ei=RpYZUbnJHZCPiAenpoDABw&bvm=bv.42261806,d.aGc&psig=AFQjCNHKT-6qsCkfUl3FbV4Ahnv7uSQLkQ&ust=1360717717057926http://www.google.com.my/url?sa=i&rct=j&q=ultrasound+scanning+device&source=images&cd=&cad=rja&docid=VDFfjzhSLsIcLM&tbnid=R2yH6N3CN4ErxM:&ved=0CAUQjRw&url=http://linkton1.en.made-in-china.com/product/JGgxEPruxnRe/China-B-Mode-Ultrasound-Scanner-CSBC-B-672A-.html&ei=lZUZUZ-6O8aSiAfW6oDwAQ&bvm=bv.42261806,d.aGc&psig=AFQjCNFv2vPWgYIA5J_1q-5fMU0vXR7UOg&ust=1360717581752720http://www.google.com.my/url?sa=i&rct=j&q=x+ray+machine&source=images&cd=&cad=rja&docid=62Unqz2cXsiumM&tbnid=ZJ1kVKjVFx--AM:&ved=0CAUQjRw&url=http://mayamedica1.en.busytrade.com/products/info/1936191/Makh50-50kw-High-Frequency-X-ray-Machine.html&ei=RpYZUbnJHZCPiAenpoDABw&bvm=bv.42261806,d.aGc&psig=AFQjCNHKT-6qsCkfUl3FbV4Ahnv7uSQLkQ&ust=1360717717057926http://www.google.com.my/url?sa=i&rct=j&q=ultrasound+scanning+device&source=images&cd=&cad=rja&docid=VDFfjzhSLsIcLM&tbnid=R2yH6N3CN4ErxM:&ved=0CAUQjRw&url=http://linkton1.en.made-in-china.com/product/JGgxEPruxnRe/China-B-Mode-Ultrasound-Scanner-CSBC-B-672A-.html&ei=lZUZUZ-6O8aSiAfW6oDwAQ&bvm=bv.42261806,d.aGc&psig=AFQjCNFv2vPWgYIA5J_1q-5fMU0vXR7UOg&ust=13607175817527208/13/2019 Devices to Overcome the Limitations of Sight (Adik)
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5. Ultrasound scanning device
ultrasonic waves - create images -organ , fetus.
Device shaped like microphone is pressed against the area being scanned.
This device sends out very high frequency sound waves into the area being scanned.
The waves bounce back upon hitting an organ and an image of the organ is then
obtained on computer screen
6. X-rays
X-rays can also be used to detect the condition of certain organs or detect fracture of
bones.In medical X-rays, the X-rays penetrate the internal soft body tissues and form
images on a film which can be examined by a radiologist
7. Periscope
* A simple periscope consists of a tube containing two plane mirrors facing one another
at an angle 45 degree.
* The periscope used in submarines are larger and more complex. The submarines
periscope consists of reflecting prisms, two telescopes and several lenses to give clear
and magnified the image of objects.
8. Magnetic Resonance Imaging (MRI) machine
* MRI is a technique that createsimage of the body using a powerful magnetic field.
* It is very useful tool in medicine because it can create images of any cross section of
human body, including head, heart, arteries and veins, from any angle and
direction.MRI enables early diagnosis of many diseases.
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LIMITATIONS OF HEARING
1. Our ears can only detect sounds within the frequency range of 20 Hz to 20 000
Hz. We cannot hear very low or very high frequency sounds.
2. Different people have different ranges of hearing.
(a) Childre have more elastic eardrums. They can hear better than adults.
(b) As we grow older, our eardrums become less elastic. Thus, our hearing
range become narrower.
3. We cannot hear sounds from a far distance clearly. We also cannot hear very
soft sounds like our heartbeat.
4. We can use several devices to overcome the limitations of hearing.
(a) Doctors use stethoscope to listen to the heartbeat of patients.
(b) Using a public address (PA) system, sounds casn be made laouder so that they
can be heard over a grater distance.
(i) A simple loudhailer consists of a microphone, an amplifier and a
loudspeaker.
http://www.google.com.my/imgres?q=stethoscope&hl=en&sa=X&tbo=d&biw=1024&bih=513&tbm=isch&tbnid=jI57q2-XjCsVmM:&imgrefurl=http://yzgoldenwell.en.made-in-china.com/productimage/AoqQZtxcHiWK-2f0j00UBvQAftchiqK/China-Dual-Head-Stethoscope-with-Inner-Spring-Binaural-JS015-.html&docid=TMt2x9ftfbuRWM&imgurl=http://image.made-in-china.com/2f0j00UBvQAftchiqK/Dual-Head-Stethoscope-with-Inner-Spring-Binaural-JS015-.jpg&w=2448&h=3264&ei=FJAZUcDTL8aciAen6oCICA&zoom=1&ved=1t:3588,r:14,s:0,i:189&iact=rc&dur=1171&sig=117192936037127062546&page=2&tbnh=175&tbnw=139&start=10&ndsp=15&tx=83&ty=93http://www.google.com.my/url?sa=i&rct=j&q=loudhailer&source=images&cd=&cad=rja&docid=81f_bKoHlt0x4M&tbnid=VpTgvOmXeeQnWM:&ved=0CAUQjRw&url=http://www.surfshop.slsa.com.au/item/loud-hailer-with-siren_patrol%20equipment&ei=LpEZUeaFKq2OiAfi5IDoDA&bvm=bv.42080656,d.aGc&psig=AFQjCNELyKm0xxj6SBFHIkUseBv-HaAI4A&ust=1360716405270951http://www.google.com.my/imgres?q=stethoscope&hl=en&sa=X&tbo=d&biw=1024&bih=513&tbm=isch&tbnid=jI57q2-XjCsVmM:&imgrefurl=http://yzgoldenwell.en.made-in-china.com/productimage/AoqQZtxcHiWK-2f0j00UBvQAftchiqK/China-Dual-Head-Stethoscope-with-Inner-Spring-Binaural-JS015-.html&docid=TMt2x9ftfbuRWM&imgurl=http://image.made-in-china.com/2f0j00UBvQAftchiqK/Dual-Head-Stethoscope-with-Inner-Spring-Binaural-JS015-.jpg&w=2448&h=3264&ei=FJAZUcDTL8aciAen6oCICA&zoom=1&ved=1t:3588,r:14,s:0,i:189&iact=rc&dur=1171&sig=117192936037127062546&page=2&tbnh=175&tbnw=139&start=10&ndsp=15&tx=83&ty=93http://www.google.com.my/url?sa=i&rct=j&q=loudhailer&source=images&cd=&cad=rja&docid=81f_bKoHlt0x4M&tbnid=VpTgvOmXeeQnWM:&ved=0CAUQjRw&url=http://www.surfshop.slsa.com.au/item/loud-hailer-with-siren_patrol%20equipment&ei=LpEZUeaFKq2OiAfi5IDoDA&bvm=bv.42080656,d.aGc&psig=AFQjCNELyKm0xxj6SBFHIkUseBv-HaAI4A&ust=13607164052709518/13/2019 Devices to Overcome the Limitations of Sight (Adik)
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(ii) A large one such as the one used in a music concert involves several
powerful amplifiers and loudspeakers.
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NAME : NUR FARHANA NATASHA BINTI TAHIR.
CLASS : 2 AL-BIRUNI
DATE OF BIRTH : 11 JULY 1999
ADDRESS : BLOCK E8-16, APT FADASON PARK,
JALAN 2/17, OFF JALAN KEPONG,
52000, KUALA LUMPUR.
PLACE OF BIRTH : HOSPITAL KUALA LUMPUR
HOBBY : SURFING INTERNET
AMBITION : DOCTOR
FATHERS NAME : TAHIR BIN ABU HASAN
MOTHERS NAME : SARIDAH BINTI ISHAK @JAAFAR
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