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Questions on Light

Q2. The diagram shows a lighthouse on a rock. It is night-time and there are boats at A, B, C, D and E moored in the water.

(a) On which boat, A, B, C, D or E, would the light from the lighthouse be brightest?

1 mark

(b) Each boat makes a shadow on the water.

(i) Draw a cross (X) on the diagram to show where the shadow of boat A will be.

1 mark

(ii) Explain why the shadow forms there.

 

1 mark

(c) The weather changes and the fog horn on the lighthouse makes a loud sound. On which boat, A, B, C, D or E, would the sound of the fog horn be quietest?

1 mark

(d) Inside the lighthouse there is a powerful lamp and some mirrors. The diagram shows the lamp and a mirror. A ray of light from the lamp is shown. Carefully draw the ray which is reflected from the mirror. Use a ruler.

2 marks

Maximum 6 marks