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Answers
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Answer:
1. The ray of light bounces back in the same direction.
2. Angle made with the incident ray to the plane mirror = 30°.
Therefore, Angle of incidence = 90° - 30° = 60°.
But, Angle of incidence = Angle of reflection.
Therefore, Angle of reflection = 60°.
3. Angle made with the incident ray to the plane mirror = 40°.
Therefore, Angle of incidence = 90° - 40° = 50°
But, Angle of incidence = Angle of reflection.
Therefore, Angle of reflection = 50°.
4. (i) 0°.
(ii) 0°.
5. (i) Virtual and erect image is formed.
(ii) Real and erect image is formed.
6. A plane mirror is required for such a necessity.
7. It is called as lateral inversion.
8. It is called as lateral inversion.
9. The image will be formed 10 cm away from the mirror, as, in a plane mirror, object distance is equal to image distance.
10. It is called Rectilinear Propagation of Light.
11. It is called a virtual image as a plane mirror always forms virtual images and virtual images cannot be formed on a screen.
12. equal.
13. False. Light from the object reflects back and reaches our eyes. Hence, we can see objects.
14. It depends on the position of the object and type of mirror. Usually it is formed inside or behind the mirror.
15. Angle of incidence = 30°.
But, Angle of incidence = Angle of reflection.
Therefore, Angle of reflection = 30°.
Therefore, Angle the reflected ray makes with the mirror surface = 90° - 30° = 60°.
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