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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: - An object is seen through a simple microscope of focal length 12 cm.
- Which one of the following bonds produces a solid that reflects light in the visible region
- Two point white dots are 1 mm apart on a black paper.
- In a circuit, the current lags behind the voltage by a phase difference of π/2.
- Electrons used in an electron microscope are accelerated by a voltage of 25 kV
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An object is seen through a simple microscope of focal length 12 cm.
- Which one of the following bonds produces a solid that reflects light in the visible region
- Two point white dots are 1 mm apart on a black paper.
- In a circuit, the current lags behind the voltage by a phase difference of π/2.
- Electrons used in an electron microscope are accelerated by a voltage of 25 kV
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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