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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
- Imagine a new planet having the same density as that of earth but it is 3 times bigger
- The work function for aluminium is 4.125 eV. The cutoff wavelength for photoelectric
- Two radiations of photons energies 1 eV and 2.5 eV, successively
- At the first minimum adjacent to the central maximum of a single-slit diffraction
- A particle executes simple harmonic oscillations with an amplitude
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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