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GCSE level questions on light

Q4. Visible light is used for communications.

(a) Name two other parts of the electromagnetic spectrum are used for communications.

[2 marks]

(b) The appearance of visible light can change when it interacts with different objects.

Complete the sentences below selecting your answers from this box of words:

absorbed
reflected
refracted
transmitted
Each answer may be used once, more than once or not at all.

When white light is incident on a green filter, only green light passes through the filter. This is because green light is _ _ _ _ _ _ _ by the filter. All other colours of light are _ _ _ _ _ by the filter. When red light shines on a blue object the red light is _ _ _ _ _ _ _ _

[3 marks]

(c) The diagram shows a spotlight containing a convex lens. A cyan filter is placed in front of the spotlight. The spotlight is directed at a yellow object in a darkened room.

Explain why the yellow object appears green.

[3 marks]

(Total 8 marks)