An object is kept on the principal axis of a concave mirror of focal l

1.	An object is kept on the principal axis of a concave mirror of focal length 12 cm. If the object is at a distance of 18 cm from the mirror, calculate then image distance. Determine the nature of the image formed by calculatingthe magnification produced by the mirror,
Answer» Given :- FOCAL length = - 12cm Object distance = - 18cm To FIND :- Image distance Nature of image MAGNIFICATION Solution :- Apply mirror formula → 1/v + 1/u = 1/f → 1/v + (-1)/18 = -1/12 → 1/v = 1/18 - 1/12 → 1/v = 2 - 3/36 → 1/v = -1/36 → v = - 36cm Hence, Image Distance is -36cm Nature of image = REAL and inverted ★ Magnification of mirror ★ → m = -v/u = hi/ho → m = -v/u → m = -(-36)/-18 → m = -36/18 → m = - 2 Hence, Magnification of mirror is - 2

An object is kept on the principal axis of a concave mirror of focal length 12 cm. If the object is at a distance of 18 cm from the mirror, calculate then image distance. Determine the nature of the image formed by calculatingthe magnification produced by the mirror,

Answer»

Given :-

FOCAL length = - 12cm
Object distance = - 18cm

To FIND :-

Image distance
Nature of image
MAGNIFICATION

Solution :-

Apply mirror formula

→ 1/v + 1/u = 1/f

→ 1/v + (-1)/18 = -1/12

→ 1/v = 1/18 - 1/12

→ 1/v = 2 - 3/36

→ 1/v = -1/36

→ v = - 36cm

Hence,

Image Distance is -36cm
Nature of image = REAL and inverted

★ Magnification of mirror ★

→ m = -v/u = hi/ho

→ m = -v/u

→ m = -(-36)/-18

→ m = -36/18

→ m = - 2

Hence,

Magnification of mirror is - 2

Discussion

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An object is kept on the principal axis of a concave mirror of focal length 12 cm. If the object is at a distance of 18 cm from the mirror, calculate then image distance. Determine the nature of the image formed by calculatingthe magnification produced by the mirror,​