A hollow double concave lens is made of very | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The focal length of a lens is given by the Lens Maker's Formula: $\frac{1}{f} = (\frac{n_L}{n_m} - 1)(\frac{1}{R_1} - \frac{1}{R_2})$.For a double

Vedclass · Accepted Answer

$L_2$ and immersed in $L_1$

Vedclass · Answer

(D) The focal length of a lens is given by the Lens Maker's Formula: $\frac{1}{f} = (\frac{n_L}{n_m} - 1)(\frac{1}{R_1} - \frac{1}{R_2})$.For a double concave lens,$R_1$ is negative and $R_2$ is positive,so $(\frac{1}{R_1} - \frac{1}{R_2}) For the lens to diverge light,it must act as a concave lens,meaning its focal length $f$ must be negative.This requires $(\frac{n_L}{n_m} - 1) > 0$,which implies $n_L > n_m$.Given $n_2 > n_1 > 1$,if the lens is filled with $L_2$ $(n_L = n_2)$ and immersed in $L_1$ $(n_m = n_1)$,then $n_L > n_m$ is satisfied.Therefore,the lens will diverge a parallel beam of light.

$A$ hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquids $L_1$ or $L_2$ having refractive indices $n_1$ and $n_2$ respectively $(n_2 > n_1 > 1)$. The lens will diverge a parallel beam of light if it is filled with

Similar Questions

Which of the following crops produces recalcitrant seeds?

Two vibrating tuning forks produce progressive waves given by $Y_1 = 4 \sin(500 \pi t)$ and $Y_2 = 2 \sin(506 \pi t)$. The number of beats produced per minute is:

If an electron and a proton have the same de-Broglie wavelength,then the kinetic energy of the electron is

Which of the following types of intercellular junctions helps in the passage of small molecules and ions?

$X$-rays of wavelength $0.140 \ nm$ are scattered from a block of carbon. What will be the wavelength of $X$-rays scattered at $90^{\circ}$ (in $nm$)?

Vedclass Test Series

Exam Paper Generator

Online Exam Module