Light Waves

Light WavesA review for the quiz

Sound waves from a radio generally travel in which medium?a)airb)lightc)earthd)water

Our eyes can detect light only within a range of _____ called visible light.a)frequenciesb)mediumsc)speedsd)periods 

The speed of a sound wavea)depends on wavelength.b)depends on amplitude.c)depends on the medium.d)None of the above

Longitudinal waves travel quickly in a _____ because the molecules are closely packed and physically bonded together.a)liquidb)solidc)gasd)None of the above

The differences in color in visible light, such as those in a rainbow, are caused by differences ina)amplitude.b)medium.c)speed.d)frequency.

Light wavesa)require a medium.b)cannot travel through liquids.c)cannot travel through solids.d)are electromagnetic waves.

Light waves are

a)transverse waves.b)rotating waves.c)longitudinal waves.d)circular waves.

The color of light is determined by the _____ of the light waves.a)mediumb)frequencyc)speedd)amplitude

Which type of electromagnetic waves has the highest energy?a)gamma raysb)infraredc)ultraviolet lightd)microwaves

Which type of electromagnetic radiation is used to kill cancer cells?a)microwavesb)ultraviolet raysc)gamma raysd)sunlight

Radar works by sending a signal out from an air-traffic control tower that is

a)analyzed by a Doppler scanner on the ground.

b)reflected off a plane back to the control tower.

c)increased in intensity as it passes through the atmosphere.

d)scanned and analyzed by a receiver on board an airplane.

The color that an object appears to be depends on the

a)angle at which visible light is reflected off the object.

b)use of additive rather than subtractive colors.

c)wavelengths of visible light that reaches your eyes.

d)speed with which visible light reaches it.

When light moves from a material in which its speed is higher to a material in which its speed is lower, it is

a)bent toward the normal.b)reflected off the boundary.c)bent away from the normal.d)changed into a virtual image.

Light rays that pass through a lens change direction because

a)of internal reflection.b)they are refracted.c)light is broken up into many

different colors.d)virtual images always appear

slightly larger than real images.

Light demonstrates wave characteristics when it isa)reflected.b)diffracted.c)refracted.d)All of the above

Light demonstrates particle characteristics when ita)knocks electrons off a metal surface.b)forms standing waves.c)passes through a narrow opening.d)All of the above

As the frequency of light waves increases,a)the energy increases.b)the energy stays the same.c)the energy decreases.d)the wavelength increases.

Light rays reflecting off a rough surface reflecta)diffusely. b)at all angles.c)at a single angle.d)None of the above

The law of reflection says the angle of incidence is _____ the angle of reflection.a)greater thanb)equal toc)less than d)None of the above

When you look in a convex mirror, the image appearsa)smaller than it really is. b)larger than it really is.c)lighter than it really is.d)darker than it really is.

Which statement about a diverging lens is correct?

a)It bends light inward and can create either a virtual or a real image.

b)It bends light inward and can only create a real image.

c)It bends light outward and can create either a virtual or a real image.

d)It bends light outward and can only create a virtual image.

Light is composed of waves and particles called:a)electronsb)photons c)quarksd)waves

The visible spectrum of light from the longest to shortest wavelength is:a)violet, indigo, blue, green, yellow, orange, redb)red, orange, yellow, green, blue, indigo, violetc)infrared, ultraviolet, gamma, x-rays, microwavesd)green, orange, red, violet

A magnifying glass is an example of a:a)convex lensb)prismc)concave lensd)convex mirror

Convex lenses converge light rays to a:a)real imageb)focal pointc)focusd)virtual image

An example of a diverging lens that spreads light rays is the:a)convex lensb)converging lensc)concave lensd)prism

A survivor from a shipwreck sees an image of a fish in the water. To catch it with her spear, she must

a)aim above the image of the fishb)aim at the image of the fishc)aim below the image of the fishd)aim behind the fish

When the crests of one wave overlap the crests of another wave or wave, this occursa)diffractionb)constructive interferencec)destructive interferenced)resonant frequencies

An echo is the result of a a)reflected sound waveb)refracted sound wavec)diffracted sound waved)dispersed sound wave

What happens to a wave when it is refracted?a)It is bentb)It is reflectedc)It is diffractedd)It is radiated

a) opticsb) convexc) imaged) convergente) objectf) divergentg) concave ____ 31. The study of how light behaves. ____ 32. A lens or mirror that is bigger in the middle. ____ 33. light rays that spread apart ____ 34. Where your eyes think something is. ____ 35. Light ray that come together. ____ 36. What you are actually looking at. ____ 37. A lens or mirror that is bigger at the ends.

a) Normalb)angle of reflectionc) Mirrord)lense) angle of incidencef) focus ____ 38. a line drawn perpendicular to the surface of a mirror or lens ____ 39. An optical device that works by refraction to bend light. ____ 40. from the normal to the incoming ray. ____ 41. from the normal to the outgoing ray ____ 42. Where all parallel rays come together 

____ 43. an optical device that works by reflection

a) photonb) EM Spectrumc) prismd) energy levele) light   ____ 44. An orbit of electrons. To move from low to high requires energy.

 ____ 45. all light: visible and invisible ____ 46. used to separate white light into its colors ____ 47. a single particle or packet of light ____ 48. a wave that can travel through a vacuum

Arrange the Electromagnetic Spectrum from low photon energy to high photon energy a) Gamma Raysb) X-raysc) Infraredd) Ultraviolete) Microwavesf) Visible Lightg) Radio Waves ____ 49. Lowest Photon Energy ____ 50. ______ ____ 51. ______ ____ 52. ______ ____ 53. ______ ____ 54. ______ ____ 55. Highest Photon Energy

Convex and Concave Lens

Convex and Concave Mirrors

Primary Colors of Light

Total internal Refraction

Mirage- Optical Illusions

two opposing parabolic mirrors

Fun with Refraction and Reflection