Question

among the two lenses that are converging the light. one of them is made of water and the other is made of oil. which one of the following is true?
a) the one which is converging more is the oil lens
b) the one which is converging more is the water lens
c) if you replace the water lens with a glass lens, it will converge in the same
manner
d) both are alike as there is no difference in the way they converge the light

Answer 1

Answer:

a) the one which is converging more is the oil lens

Explanation:

Here I am considering that both the lenses have equal radii of curvatures

Lens-makers formula :

$\boxed{\frac{1}{f}=(\frac{\mu_2}{\mu_1}-1)(\frac{1}{R_1}-\frac{1}{R_2})}$

Where $\mu_2 :$ refractive index of lens medium

           $\mu_1 :$ refractive index of surrounding medium, here air

∴For two given lenses of same radii of curvature but different medium

$\boxed{f \alpha \frac{1}{\mu}}$

Since $\mu_o_i_l> \mu_w_a_t_e_r,\\\\\boxed{ f_o_i_l<f_w_a_t_e_r }$

Therefore rays from infinity converge more in case of oil than water

Hope this answer helped you :)