The focal length of a converging lens are $f_{V}$ and $f_{R}$ for violet and red light respectively. Then

f_{V} > f_{R}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

f_{V} = f_{R}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

f_{V} < f_{R}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Any of the three is possible depending on the value of the average refractive index

μ

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $f_{V} < f_{R}$
In converging lenses the light rays converges at focus of lens.
if the wavelength of light is less then it will deviate most and it will converge nearby lens and if wavelength of light is more then it will converge far to the lens.
thus if we use red light and violet light
$λ_{V} < λ_{R} f_{V} < f_{R}$

Suggest Corrections

Similar questions

(f_{r} - f_{v})

(f)

(ω)

f_{r} - f_{v} = ω f

f_{v} \to

f_{r} \to

f_{U V} \to

f_{B}

f_{R}

F_{B}

F_{R}

P_{R} ⇌ P_{F R}

Join BYJU'S Learning Program