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Light Review
This is a review for the light chapter.
| Question | Answer |
|---|---|
| How will light reflect off a mirror? | predictable angles |
| Light travels in a straight line until...................... | it hits an object. |
| Light is made of two types of energy which are ____________ and ____________. | magnetic and electric |
| What are transverse waves? | They are waves that vibrate in a direction perpendicular to their motion. |
| Define wavelength. | It is the distance between the crest of one wave to the crest of the very next wave. |
| Light travels in straight lines called light _____. | rays |
| Define photon. | It is a tiny bundle of energy by which light travels. |
| When light bounces off an object that is rough it will reflect at ____________ angles. | unpredictable |
| What materials allow most of the light to pass through? | transparent |
| Name a few transparent materials. | clear glass, clear contact lenses, clear Saran wrap etc. |
| Objects or materials that blur light as it passes through are called _____________. | translucent |
| Which item is NOT a translucent object. ( very clean water, 1 gal. plastic milk carton, frosted glass) | very clean water |
| Objects that let little or no light through are called ___________. | opaque |
| Name the largest black opaque object in our classroom. | chalkboard |
| Where is the sun when there is no shadow? | directly overhead |
| The two MAIN sources of all light are ________ and ____________. | natural or artificial |
| What are two sources of natural light? | sun and lightning |
| Name a source of artificial light in our classroom. | overhead lights, T.V., overhead projector,flashlight,etc. |
| When photons are absorbed by an object, those objects will _________ energy. | gain |
| Where do you need to stand if you want to see a shadow? | You need to stand between the light source and the other object. |
| What medium can light travel fastest through? ( glass, air , water , vacuum) | vacuum |
| If the angle of an incoming light ray equals the angle of a reflected ray it is called what? | The Law of Reflection |
| Define image. | It is a picture created by a light bouncing off an object. |
| Does a mirror absorb most of the light that strikes it? | No, it reflects it. |
| Is it true that when light strikes most objects, some of it is reflected and some is absorbed? | Yes it's true. |
| What type of surface scatters light? | rough, uneven |
| Do both mirrors abd paper reflect light? | Yes |
| What causes a straw to look broken when placed in a glass of water? | Refraction |
| When light travels from air to water the light rays do what? | slow down |
| The bending of light is called ___________. | refraction |
| Why does light travel more slowly through a clear glass than through air? | The particles of the glass are more dense so it slows down the light rays traveling through it. |
Created by:
apoole
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