A. Direction Read and understand each item carefully. Encircle the correct answer
1. A form of energy that allows us to see as it hits an object.
A.light.
B. sound.
C.heat.
D. reflection.
2. It refers to the bending of light as it passes from a medium to another.
A. refraction.
B.reflection.
C radiation.
D. conduction.
3.A_____is formed when the light of the sun passes through the raindrops.
A rainbow.
B.Sun.
C.light.
D. rays.
4.How does light travel?.
A.light travel in zigzag line.
B.light travel in a straight line.
C.light travels in broken line.
D. light travels in crooked shape.
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Answer:
1. A. Light
- Light is a visible form of radiant energy that travels in waves. It is the only form of energy that can be seen by the human eye. Aside from the Sun, light energy is given off by other stars, light bulbs, lasers and hot objects. Light energy is very useful, as it helps us to see the world around us.
2. A. Refraction
3. A. Rainbow
-The common rainbow is caused by sunlight internally reflected by the backs of falling raindrops, while also being refracted at the air/water boundary. The sunlight in this picture is coming from behind the observer, and the rainbows are in the rainstorm. The brightest rainbow is the primary rainbow.
4. B. light travel in a straight line.
- Any physics student knows that light travels in a straight line. But now researchers have shown that light can also travel in a curve, without any external influence. The effect is actually an optical illusion, although the researchers say it could have practical uses such as moving objects with light from afar.