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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
- The manifestation of band structure in solids is due to
- Dimensional formula of magnetic field in terms of mass M, length L
- A concave lens of focal length f forms an image which is 1/3 times the size
- The de-Broglie wavelength of an electron moving with a velocity 1.5×10⁸ ms⁻¹ is equal
- A satellite S is moving in an elliptical orbit around the earth. The mass
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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