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Acids, Bases And Salts

Question
CBSEENSC10012847
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A person is running towards a plane mirror with a speed of 5 m/s. With what speed his image in the plane mirror appears to him to be moving towards him?

Solution

When a person moves towards a mirror, his virtual image also moves towards the mirror by equal distance. 

Relative speed of man and his image = 2 × Speed of man towards the mirror
                                                          = 2 × 5
                                                          = 10 m/s.

Some More Questions From Acids, Bases and Salts Chapter

What is meant by the optical image of an object?

What are real and virtual images? Can these images be obtained on a screen? Give reasons in support of your answer.

Give three points of differences between real and virtual images.

What is a mirror? Mention the different types of mirrors commonly used.

Define the following terms in connection with reflection of light:
Incident ray, reflected ray, point of incidence, normal, angle of incidence and angle of reflection.

State the laws of reflection of light.

Are the laws of reflection applicable to plane surfaces also valid for curved surfaces?

State the important properties of images formed by plane mirrors.

What is lateral inversion of an image ? What is the cause of lateral inversion?

What is a spherical mirror? What are the two different types of spherical mirrors?

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