Light

Which of the following is a light source?

A - Sun

B - Star

C - Firefly

D - Mirror

E - Street light

• B & C only

• D & E only

• A, C & D only

• A, B, C & E only

Which of the following is the main reason that we can see the Moon at night?

• The moon reflects the light from the Sun.

• The moon reflects the light from the Earth.

• The moon is a light source and it gives off light.

• The moon reflects the light both from the Sun and the Earth.

Steve shone a torch into a hole on the left side of a box as shown.

A ball was placed in the position shown in the diagram.

What would Steve see when he looked into the box through the hole indicated on the diagram?

• He would be able to see the whole ball.

• He would be able to see the left half of the ball.

• He would be able to see the right half of the ball.

• He would not see anything because the inside of the box was too dark.

Which of the following best describes the reason why the shadow of an apple is formed on a screen?

• The apple reflects the light.

• The apple absorbs the light.

• The light from the light source is too bright.

• The light from the light source is blocked by the apple.

Study the diagram as shown.

If P is a sheet of glass, which of the following shadows would you be able to see on the screen?

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Barry set up an experiment to form two shadows of an object on a screen as shown.

Which of the following objects was used in this experiment?

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At 8am, Andy observed that the lamp post outside his house formed a shadow at the position shown in the diagram.

Which of the following diagram shows the shadow of the lamp post formed in the late evening?

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Sunlight shining through the windows of a public library makes the place too bright and glaring. A decision was made to substitute the windows with another material so as to cut down the glare and brightness.

Which of the following materials would be a suitable substitute?

• Soft wood

• Clear plastic

• Frosted glass

• Wired clear glass

Mary and Betty each held the end of a rubber hose and looked through it. However, they could not see other initially. When May and Betty each moved back, they can finally see each other's eye.

What does the above show about light? It shows that light ______________.

• is a form of energy

• travels in a straight line

• is given out from the eyes

• can travel in a rubber hose

Susan placed her hand in front of a torch so that a shadow could be cast on the wall.

Which of the following would she be able to observe if she moved her hand nearer to the wall?

• Her hand becomes smaller.

• The shadow of her hand disappeared.

• The shadow of her hand becomes larger.

• The shadow of her hand becomes smaller.