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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
- Assuming the sun to have a spherical outer surface of radius r
- A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4
- The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated
- Two resistors of 6Ω and 9Ω are connected in series to a 120 V source.
- During an adiabatic process, the cube of the pressure is found to be inversely
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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