Year 9 Light and Sound Test Spring 2008

Year 9 Light and Sound Test Spring 2008

1. COMPLETE the following DIAGRAMS. LABEL CLEARLY the ANGLES of EACH RAY.

2 (a) Four pieces of apparatus are shown below.

Each box below contains a piece of apparatus. The lines show light rays going into and out of the boxes.

In each box, draw one piece of apparatus (from the four above) that affects the light rays in the way shown. Use each piece of apparatus once only.

(4 marks)

3. (a) A microphone and oscilloscope are used to show the sound wave pattern of a musical

instrument.

(i) What does the musical instrument make the surrounding air do?

(1 mark)

...............................................................................................................................................................

(ii) Four different sound wave patterns are shown. They are all drawn to the same scale.

Which one of the sound wave patterns, A, B, C or D has:

1. the largest amplitude ...........................................................................................

2. the lowest frequency? .......................................................................................... (2 marks)

(b) Complete the following sentences with a suitable word.

(6 marks)

(i) A musical note with a low frequency has a ______________ pitch than one with a high frequency.

(ii) A musical note with a large amplitude sounds ______________ than one with a small amplitude.

(iii) Sound is a type of ____________ and travels as a ____________ .

(iv) Sound cannot travel through a _______________ .

(v) Some sounds have a _________________ which is too high for humans to hear.

4 (a)

(b) Can the driver of the red car see any part of the blue car? _________________________________________

__________________________________________________________________________________________

__________________________________________________________________________________________

__________________________________________________________________________________________

YOU MAY WISH TO HELP EXPLAIN YOUR ANSWER BY DRAWING ON THE DIAGRAM.

5. The diagram shows two plane mirrors being used in a periscope to allow someone to see over an obstacle.

Complete the path of the ray to show how it reaches the observer.(2)

6. This question is about sound waves

(a)Explain why sound waves cannot travel through a vacuum.

(2)

(b)What happens to the sound you hear when . . .

(i)the frequency of the sound wave decreases?

(ii)the amplitude of the sound wave increases?

7.

Complete the ray diagrams to show how the light emerges from the other side of the glass block

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Complete these sentences.

The driver of the blue car cant see the ________

car. This is because light from the red car travels

in _______________ lines.

Light doesnt travel round _____________ .

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3 marks

3 marks

A

B