JEE PHYSICS MCQ: RAY OPTICS

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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

View answer and explanation

Correct option: B

{f_V}\,\, < \,\,{f_G}\,\, < \,\,{f_R}

Option B is correct because the refractive index is highest for violet light and lowest for red light, leading to the shortest focal length for violet and the longest for red.

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