SATHEE: Optics Question 794

Optics Question 794

Question: A short linear object of length i lies along the axis of a concave mirror of focal length f at a distance u from the pole of the mirror. The size of the image is approximately equal to

Options:

A) $ℓ {(\frac{u - f}{f})}^{1 / 2}$

B) $ℓ {(\frac{u - f}{f})}^{2}$

C) $ℓ {(\frac{f}{u - f})}^{1 / 2}$

D) $ℓ {(\frac{f}{u - f})}^{2}$

Show Answer

Answer:

Correct Answer: D

Solution:

[d] The axial magnification $δ v = - \frac{v^{2}}{u^{2}} \frac{d t}{d t}$

$= {(\frac{f}{u - f})}^{2} ℓ .$

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Optics Question 794

Question: A short linear object of length i lies along the axis of a concave mirror of focal length f at a distance u from the pole of the mirror. The size of the image is approximately equal to

Options:

Answer:

Solution:

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