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Acids, Bases And Salts

Question
CBSEENSC10012768
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A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?

Solution
Given, a concave mirror.

Object distance, u = -10 cm 

As the image formed is real, so magnification m must be negative. 

Magnification is the ratio of the height of the image to the height of the object. 
h' = 3h (given)

∴             m = h'h = -vu = -3 
 
                  v = 3u 

i.e.,             v = 3 × (-10)    = -30 cm. 

Since, v is negative, the image is located at a distance of 30 cm from the mirror on the object side of the mirror.

Some More Questions From Acids, Bases and Salts Chapter

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?

Define the following terms in connection with spherical mirrors:
(i) Pole (ii) Centre of curvature (iii) Radius of curvature (iv) Principal axis (v) Linear aperture (vi) Angular aperture (vii) Principle focus (viii) Focal length  (ix) Focal plane.

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