Light

The diagram below shows a lighted torch shining on a metal container.

Which one of the diagrams below shows the correct shadow of the metal container formed on the white screen?

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Which of the following is NOT a source of light?

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Benny is able to see the red apple in front of him because the apple ________________________.

• 1: give off its own light

• 2: reflects light into his eyes.

• 3: allows some light to pass through

When an object does not allow light to pass through it, _____.

• it would appear white

• it would appear transparent

• we are not able to see it

• we are not able to see the things behind it

The above diagram shows that light _____.

• is a form of energy

• travels in straight lines

• can be reflected

• can pass through transparent objects

Which of the following allows us to see the image of an object through a periscope?

• Light can bend.

• Light rays can be reflected.

• Light travels in a straight line.

• Light is given out by all objects.

Which one of the following explains why Zachary can see the table?

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Mrs Goh was in a dark room. She switched on the lamp shown in diagram 1.

She then placed a lamp shade on the lamp as shown in diagram 2.

Which of the following best explains why the lamp in diagram 2 looks less bright than in diagram 1?

• Less light from the lamp enters Mrs Goh’s eyes.          

• The lamp shade blocks all the light from the lamp.

• Less light is reflected from the lamp into Mrs Goh’s eyes.

• Shadow of the lamp formed on the lamp shade blocked the light from entering Mrs Goh’s eyes.

Which one of the following graphs shows how the length of the dog’s shadow

would change as it walked from position A to position C?

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The shadow of the object becomes bigger when ___________________.

(Select all correct answers)

• the object is moved nearer to the screen

• the torchlight is moved nearer to the object

• the screen is moved further away from the object

• the torchlight is moved further away from the object