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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 tuning fork gives 4 beats with 50 cm length of a sonometer
- Which phenomenon best supports the theory that matter has a wave nature?
- The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A tuning fork gives 4 beats with 50 cm length of a sonometer
- Which phenomenon best supports the theory that matter has a wave nature?
- The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
- In Young’s double slit experiment, a third slit is made in between the double slits.
- The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV,
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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