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Questions on Light

Q18. An actor is on a stage in a theatre. A spotlight is shining on him.

(a) A ray of light travels from the spotlight to the actor.

(i) Which line shows the ray? Give the correct letter.

B

Light travels in a straight line.

1 mark

(ii) How long does the light take to travel from the spotlight to the actor?

A
 about a hundred millionth of a second
B
 about a tenth of a second
C
 about a second
D
 about ten seconds

1 mark

(b) The actor's voice sounds different to the people in the front and back rows of the audience.

(i) How does the actor's voice sound different to a person in the back row?

It sounds quieter or softer.

Do not accept 'lower'. It is okay to say of lower volume, but 'lower' alone might mean lower pitch.

Never give an answer that can have two or more interpretations - you won't get the mark!

1 mark

(ii) Complete the sentence with:

'longer than', 'shorter than' or 'exactly the same as'.

When the actor is at the back of the stage, the time period his voice takes to reach the audience is .……………longer than ……………… the time it took when he was at the front of the stage.

1 mark

Maximum 4 marks