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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
- If two vectors are equal in magnitude and their resultant is also equal in magnitude
- A particle of mass m moves with constant speed along a circular path of radius r under
- The magnetic flux linked with a circuit of resistance 100Ω increases from 10 to 60 Wb.
- A ball is projected upwards from the foot of a tower. The ball crosses the top
- A tuning fork vibrates with 2 beats in 0.04 second. The frequency of the fork is
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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