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Optics lesson 1
Question | Answer |
---|---|
What is light? | Light is a form of energy |
What is rectilinear propagation of light? | Light always travels in a straight line |
Ray model of light | light is represented by a straight line or ray |
What do you mean by transmit? | Pass through |
What do you mean by reflect? | Bounce back into the same medium |
What do you mean by absorb? | Get trapped in it |
What is a transparent material? | Allows light to pass through freely. Only a small amount of light is absorbed or reflected |
What is a translucent material? | allows most rays to pass through, but the rays are scattered in all directions |
what is an opaque material? | Prevents any light from passing through it. it will only absorb or reflect light |
what is a shadow? | A shadow is an area where direct light from a light source cannot reach due to obstruction by an object. |
what is the relationship between the size of shadow and distance of object from light source? | the farther an object from a source of light, the smaller its shadow will be |
give example of transparent material | clear glass |
give example of opaque material | mirror |
give example of translucent material | wax paper |