SATHEE: Optics Question 691

Optics Question 691

Question: The focal lengths for violet, green and red light rays are $f_{V}, f_{G}$ and $f_{R}$ respectively. Which of the following is the true relationship

[BHU 2004; CBSE PMT 1997]

Options:

A) $f_{R} < f_{G} < f_{V}$

B) $f_{V} < f_{G} < f_{R}$

C) $f_{G} < f_{R} < f_{V}$

D) $f_{G} < f_{V} < f_{R}$

Show Answer

Answer:

Correct Answer: B

Solution:

$f \propto \frac{1}{μ - 1}$ and $μ \propto \frac{1}{λ}$

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Optics Question 691

Question: The focal lengths for violet, green and red light rays are fV,fG and fR respectively. Which of the following is the true relationship

Options:

Answer:

Solution:

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Question: The focal lengths for violet, green and red light rays are $f_{V}, f_{G}$ and $f_{R}$ respectively. Which of the following is the true relationship