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Acids, Bases And Salts

Question

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State the laws of reflection of light.

Solution

When a ray of light is incident on a mirror, it gets reflected in accordance with the following laws of reflection:

First law: The incident ray, the reflected ray and the normal at the point of incidence all three, lie in the same plane.

Second law: The angle of incidence (i) is equal to the angle of reflection (r).

i.e., ∠i = ∠r.

Fig. Reflection in a plane mirror

Some More Questions From Acids, Bases and Salts Chapter

Define a ray of light and a beam light. What are the different types of beams of light?

What is an optical medium? How can we classify different media on the basis of their behaviour towards light?

What do you mean by reflection, refraction and absorption of light?

Which type of phenomenon (reflection or refraction) occurs when light falls on (i) a highly polished surface like a mirror and (ii) a transparent medium like glass or water?

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.

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