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Acids, Bases And Salts

Question

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Mention the types of mirrors used as (i) rear view mirrors, (ii) shaving mirrors. List two reasons to justify your answers in each case.

Solution

(i) Convex mirrors are used as Rear view mirrors because:

The image formed is always virtual and erect.
Image formed is diminished in size; hence, the mirrors cover larger field of view.

(ii) Concave mirrors are used as shaving mirrors because:

Image formed is magnified in size; so, a person can see the minute details of his face in the mirror.

When the object is placed in front of the mirror, image formed is virtual and erect.

Some More Questions From Acids, Bases and Salts Chapter

Briefly discuss the various theories about the nature of light.

What is the wavelength range of visible light? What is the importance of this wavelength range?

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.

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