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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
- Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 μC each.
- The dimensions of Planck’s constant is same as that of
- A body is placed in an insulating container at temperature 227⁰C.
- Electrons in a certain energy level n=n₁, can emit 3 spectral lines. When they
- The current in a conductor varies with time t as I=2t+3t² Where I is in amperes
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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