A lens x has focal length 20cm and lens y has focal length 40cm. Which lens would u select to obtain a more convergent beam of light and why?

Open in App

Solution

The lens with a smaller focal length would exhibit more convergence as the light rays merge earlier on the principle axis than compared.
So, the lens X of focal length would have a more convergent beam of light.

Suggest Corrections

Similar questions

Q. You are provided with two lenses of focal length 20 cm and 40 cm respectively. Which lens will you use to obtain more convergent light ?

How r power and focal length of a lens related? U r provided with two lenses of focal length 20cm and 40cm respectively which lens will u use to obtain more convergent light?

Question 27
How are power and focal length of a lens related? You are provided with two lenses of focal length 20 cm and 40 cm respectively. Which lens will you use to obtain more convergent light?

Q. A beam of light converges to a point A. A lens is placed in the path of the convergent beam

12

cm from P. At what point does the beam converge if the lens is (a) a convex lens of focal length

20

cm, (b) a concave lens of focal length

16

cm?

A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12 cm from P. At what point does the beam converge if the lens is (a) a convex lens of focal length 20 cm, and (b) a concave lens of focal length 16 cm?

Join BYJU'S Learning Program

A lens x has focal length 20cm and lens y has focal length 40cm. Which lens would u select to obtain a more convergent beam of light and why?

The lens with a smaller focal length would exhibit more convergence as the light rays merge earlier on the principle axis than compared.So, the lens X of focal length would have a more convergent beam of light.

The lens with a smaller focal length would exhibit more convergence as the light rays merge earlier on the principle axis than compared.
So, the lens X of focal length would have a more convergent beam of light.