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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 solid sphere, disc and solid cylinder all of the same mass and made up of same material
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A solid sphere, disc and solid cylinder all of the same mass and made up of same material
- The maximum velocity of a particle, executing simple harmonic motion with an amplitude
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
- A capacitor of capacitance 100μF is charged by connecting it to a battery of voltage
- A thin circular ring of mass M and radius R is rotating in a horizontal plane about
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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