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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: - If two soap bubbles of different radii are connected by a tube
- If light emitted from sodium bulb is passed through sodium vapour,
- A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If two soap bubbles of different radii are connected by a tube
- If light emitted from sodium bulb is passed through sodium vapour,
- A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
- A flywheel rotating about a fixed axis has a kinetic energy of 360 J when
- 4 point charges each +q is placed on the circumference of a circle
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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