SATHEE: Optics Question 929

Optics Question 929

Question: An object is placed at $20 c m$ from a convex mirror of focal length $10 c m .$ The image formed by the mirror is

[JIPMER 1999]

Options:

A) Real and at $20 c m$ from the mirror

B) Virtual and at $20 c m$ from the mirror

C) Virtual and at $20 / 3 c m$ from the mirror

D) Real and at $20 / 3 c m$ from the mirror

Show Answer

Answer:

Correct Answer: C

Solution:

$u = - 20 c m,$

$f = + 10 c m$ also $\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$

$\Rightarrow \frac{1}{+ 10} = \frac{1}{v} + \frac{1}{(- 20)} \Rightarrow v = \frac{20}{3} c m;$ virtual image.

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Optics Question 929

Question: An object is placed at 20cm from a convex mirror of focal length 10cm. The image formed by the mirror is

Options:

Answer:

Solution:

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Question: An object is placed at $20 c m$ from a convex mirror of focal length $10 c m .$ The image formed by the mirror is