Question

An object is placed at a distance
of 10 cm from a Concave mirror of focal length 15 cm. Find the position and nature of the image.​

Answer 1

U = -10 cm

F = -15 cm

1/f = 1/v - 1/u

1/-15 = 1/v - 1/-10

-1/v = 1/15 + 1/10

-1/v = 2+3/30

-1/v = 1/6

v = -6 cm

Nature of Image-

Enlarged

Virtual and Erect

Behind the  Mirror

Answer 2

✰ Question Given :

• An object is placed at a distance of 10 cm from a Concave mirror of focal length 15 cm. Find the position and nature of the image.

✰ Required Solution :

★ Value Given to us :

• object is placed at a distance of 10 cm

• Concave mirror of focal length 15 cm.

★ Formula Used Here :

• 1/v + 1/u = 1/f

★ Putting Value in Formula :

• ➦ 1/v + 1/(- 15) = 1/10

• ➦ 1/v - 1/15 = 1/10

• ➦ 1/v = 1/10 + 1/15

• ➦ 1/v = (3 + 2)/30

• ➦ 1/v = 5/30

• ➦ 1/v = 1/6

• ➦ v = 6 cm

★ Hence, the image distance is 6 cm. ★

✰ Nature , Position of the image :

• The image is formed behind the mirror and it is virtual and erect.

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