Question

a man 180 cm tall stands 4.5 metre in front of a large vertical plane mirror . then the angle subtended at the eye by his image in the plane mirror is

Answer 1

The horizontal distance of the virtual image from the eye = 4.5 + 4.5 = 9 m
The height of the image = 1.80 m

Angle subtended at the eye = Tan⁻¹ 1.80/9 = Tan⁻¹ 0.20 = 11.3 deg

Answer 2

Answer:

11.3%

Explanation:

The horizontal distance of the virtual image from the eye = 4.5 + 4.5 = 9 m

The height of the image = 1.80 m

Angle subtended at the eye = Tan⁻¹ 1.80/9 = Tan⁻¹ 0.20 = 11.3 deg

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