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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
- Nickel shows ferromagnetic property at room temperature. If the temperature is
- A light of wavelength 5000Å falls on a sensitive plate with photoelectric work
- A transistor is operated in common emitter configuration at constant collector
- In Young’s experiment, the ratio of maximum to minimum intensities of the fringe
- If in a L-R series circuit the power factor is 1/2 and R=100Ω, then the value of L is,
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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