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Waves, Lenses, Microscopes
Science Skills – Part 1 Safety & Mag
• Wave interference.
• Ripple tank simulator.• http://www.falstad.com/ripple/
• Identify some properties of waves, include reflection, interference and diffraction (refraction?).
• Lens: A transparent optical device used to converge or diverge transmitted light.
• Lens: A transparent optical device used to converge or diverge transmitted light.
B
Which lens is diverging light?
• Lens: A transparent optical device used to converge or diverge transmitted light.
BDiverging Light
• Lens: A transparent optical device used to converge or diverge transmitted light.
BDiverging Light
• Lens: A transparent optical device used to converge or diverge transmitted light.
B
Converging light
• Lens: A transparent optical device used to converge or diverge transmitted light.
B
Converging light
• Please sketch the following. – Please use a straight edge.– Complete diagrams of both from the videos.
• Video Link! Concave and Convex Lens– http://www.youtube.com/watch?v=DPvvjjnKs4k&feat
ure=results_main&playnext=1&list=PL64DF1909345AF984
• Video Link! Ray Box and Optics.– http://www.youtube.com/watch?v=8gyGfiiC3ms&
feature=related
• Activity Simulator: • http://phet.colorado.edu/en/simulation/geom
etric-optics
• Activity! Converging light sketch / lens– http://www.youtube.com/watch?v=BrNB_BacIkA
&feature=related
– Sketch this starting template (double convex)
• Activity! Diverging light sketch / lens– http://www.youtube.com/watch?v=8fUygzGO3b4&fe
ature=related
– Sketch this starting template (double concave)
Which lens is converging light?
Which lens is converging light?
Convex
Convex
Concave
Convex
Concave
Convex
Concave
“Get out of my cave.”
• Concavo-convex
• Concavo-convex
• Which a concave polygon?
• Which a concave polygon?
• Which a concave polygon?
Learn more about light, optics, and lenses at: lhttp://www.nightlase.com.au/education/optics/lenses.htm
• Which is double convex?
B
• Which is double convex?
B
• Which is double concave?
B
• Concave Mirror
• Which mirror is convex, and which mirror is concave?
• Which mirror is convex, and which mirror is concave?
• Which mirror is convex, and which mirror is concave?
• Which mirror is convex, and which mirror is concave?
• Which mirror is convex, and which mirror is concave?
• For those who wear eyeglasses, the shape of the lens in the eye glasses help to correct the focus point.
• These eyeglasses are double_________?
• These eyeglasses are double_________?Concave
• These eyeglasses are double_________?Concave
• Nearsighted
• Nearsighted
• Farsighted
• Farsighted
• Which is nearsightedness, and which is far sightedness?
A B
A
Farsightedness
A
Farsightedness Nearsightedness
Farsightedness Nearsightedness
• Is this person nearsighted or far sighted?
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• Answer! Farsighted
• Answer! Farsighted
• Activity! Vision test. Second from the bottom row from the back of the room.
• Hubble Space Telescope.
• Activity! Lens Optics Simulation– http://phet.colorado.edu/en/simulation/geometric-optics
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which microscope should be used to view a bumble bee, living cell, and deep into a dead cell?
• Which device should we use to look at the specimen on the left?
• The device in the middle, called a stereoscope is used for large objects?
• Which device should we use to look at the specimen on the left?
• The microscope on the right is a compound light microscope and is used for very small specimens that light can pass through.
• This is stereoscopic microscope. • It looks at things in which light cannot pass like
a bumble bee. – Lets you see the image in 3D.
• This is stereoscopic microscope. • It looks at things in which light cannot pass like
a bumble bee. – Lets you see the image in 3D.
• This is stereoscopic microscope. • It looks at things in which light cannot pass like
a bumble bee. – Lets you see the image in 3D.
• This is a light microscope. – It lets you magnify images that light can pass
through. Uses a glass slide and cover slip.
• This is a light microscope. – It lets you magnify images that light can pass
through. Uses a glass slide and cover slip.
• This is a light microscope. – It lets you magnify images that light can pass
through. Uses a glass slide and coverslip.
Glass Slide
Glass Slide
Coverslip
Glass Slide
Coverslip
Drop of water for a wet mount slide.
Glass Slide
Coverslip
Drop of water for a wet mount slide.
Learn more about wet mount slides, oil immersion, and more at…http://www.microbehunter.com/2010/08/13/making-a-wet-mount-microscope-slide/
• You do not put large objects under a light microscope such as a rock, pencil, finger, etc.
• You do not put large objects under a light microscope such as a rock, pencil, finger, etc. – Specimens need to be incredibly thin and light
must pass through.
• You do not put large objects under a light microscope such as a rock, pencil, finger, etc. – Specimens need to be incredibly thin and light
must pass through. Uses Slides!
• This is an electron microscope.
• This is an electron microscope. It can magnify specimens much smaller than a light, or stereoscope,
• This is an electron microscope. It can magnify specimens much smaller than a light, or stereoscope, but doesn’t usually view live cells or specimens.
• This is an electron microscope. It can magnify specimens much smaller than a light, or stereoscope, but doesn’t usually view live cells or specimens.
Electron Microscopes.: Learn more at.. http://www.jic.ac.uk/microscopy/intro_em.html
• Scanning electron microscope. – Lets you see small specimens in 3-D.
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• Video! A look at the atoms in steel. Look closely .
– http://www.youtube.com/watch?v=dNvdrpEmS48
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• Head of a flea under an electron microscope.
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• What is this a picture of? – Hint, It’s on your homework.
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• What is this a picture of? – Hint, It’s on your homework.
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• What is this a picture of? – Hint, It’s on your homework.
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• What is this a picture of? Hint, It’s on your lunch?
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• What is this a picture of? Hint, It’s on your lunch? Grain of Table Salt.
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• What is this a picture of? Hint- It may be on your person.
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• What is this a picture of? Hint- It may be on your person.
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• What is this a picture of? Hint- It may be on your person.
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• What is this a picture of? Hint- It may be on your person. Answer: Velcro
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• Diatom (Protista) Shell made of glass.
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• Cross section of a leaf.
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• Eye of a fruit fly.
• Eye of a fruit fly.
• Variety of Pollen Grains.
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• Human hair.
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• Electric Guitar String.
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• Nylon stockings.
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• Microorganisms on a sheet of paper.
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Head of Tick
• Aquatic skin parasites on fish.
• Microscopic Spider.
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• Dust mite.
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• Dust mite. If you are allergic to dust, it is most likely the feces of the dust mite.
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• Dust mite. If you are allergic to dust, it is most likely the feces of the dust mite.
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• Porcupine quill.
• Claw of Black Widow Spider
• Video! (Optional) More Magnified Images.– http://www.youtube.com/watch?v=SIOOLXbwWME
![Microscopes Biology Light Microscope (LM) [aka Compound Microscope] Visible light is projected through the specimen. Glass lenses enlarge the image &](https://img.pdfslide.net/doc/110x75/56649f135503460f94c27df1/microscopes-biology-light-microscope-lm-aka-compound-microscope-visible.jpg)
