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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
Related Questions: - A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m
- Two vessels separately contain two ideal gases A and B at the same temperature,
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m
- Two vessels separately contain two ideal gases A and B at the same temperature,
- The dimensions of mobility of charge carriers are
- The phase difference between the instantaneous velocity and acceleration of a particle
- A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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