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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
- A long straight wire is carrying a current of 12 A. The magnetic field at a distance
- If (range)² is 48 times (maximum height)², then angle of projection is
- Two bodies of masses m₁ and m₂ and having velocities v₁ and v₂ respectively
- A nucleus ᴢXᴬ emits an α- particle with velocity v. The recoil speed of the daughter
- In which process, the P-V indicator diagram is a straight line parallel to volume
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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