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WAEC Physics 2014 Paper

Question : 32

Total: 48

Solution:

Concept:

For two plane mirrors inclined at angle

\theta

, the number of images formed is

n = \frac{360^\circ}{\theta} - 1

, when

\frac{360^\circ}{\theta}

is an integer.

Explanation:

Here, the angle between the mirrors is

\theta = 60^\circ

First, find

\frac{360^\circ}{\theta}

\frac{360^\circ}{60^\circ} = 6

Since 6 is an even integer, the formula applies directly.

Now subtract 1 to get the number of images:

n = 6 - 1 = 5

Hence, 5 images are formed.

Answer:

5

images are formed.

Correct option: C.

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