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If the image formed by a convex mirror of focal length 30 cm is a quarter of the size of the object, then the distance of the object from the mirror will be
Options
(a) 30 cm
(b) 60 cm
(c) 90 cm
(d) 120 cm
Correct Answer:
90 cm
Explanation:
Given, f = + 30 cm and m = 1 / 4 Magnification, m = f / (f – u)
Therefore, 30 / (30 – u) = 1 / 4
30 – u = 120
⇒ u = -90 cm
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4
- A conducting square frame of side ‘a’ and a long straight wire carrying current I
- A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden
- In which of the processes, does the internal energy of the system remain constant?
- An unpolarised beam of intensity I is incident on a pair of nicols making an angle
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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