Q22. Four lenses of focal length +5 cm and ±200 cm are available for making a telescope. To produce

Q: What is the correct answer for CUET UG Physics Q22?

The correct answer is d. The angular magnification (M) of a refracting telescope in normal adjustment is given by the ratio of the focal length of the objective lens (f_o) to the focal length of the eyepiece (f_e): M = |f_o / f_e|. To achieve the largest possible magnification, we need to choose an objective lens with the longest focal length and an eyepiece with the shortest focal length. Both the objective and eyepiece

Q: Q22. Four lenses of focal length +5 cm and ±200 cm are available for making a telescope. To produce the largest magnification for making a telescope with the help of these lenses, the focal length of…

The correct answer is d. The angular magnification (M) of a refracting telescope in normal adjustment is given by the ratio of the focal length of the objective lens (f_o) to the focal length of the eyepiece (f_e): M = |f_o / f_e|. To achieve the largest possible magnification, we need to choose an objective lens with the longest focal length and an eyepiece with the shortest focal length. Both the objective and eyepiece

Q: What are the options for this CUET UG Physics question?

A. +200 cm · B. -5 cm · C. -200 cm · D. +5 cm

Question

Q22. Four lenses of focal length +5 cm and ±200 cm are available for making a telescope. To produce the largest magnification for making a telescope with the help of these lenses, the focal length of eye piece should be:
(a) +200 cm
(b) -5 cm
(c) -200 cm
(d) +5 cm

FirstInTest · Accepted Answer

The angular magnification (M) of a refracting telescope in normal adjustment is given by the ratio of the focal length of the objective lens (f_o) to the focal length of the eyepiece (f_e): M = |f_o / f_e|. To achieve the largest possible magnification, we need to choose an objective lens with the longest focal length and an eyepiece with the shortest focal length. Both the objective and eyepiece in an astronomical telescope are typically convex lenses, meaning their focal lengths are positive. From the available lenses (+5 cm, +200 cm, -5 cm, -200 cm), the longest positive focal length is +200 cm, which should be used for the objective lens (f_o). The shortest positive focal length is +5 cm, which should be used for the eyepiece (f_e). Therefore, the focal length of the eyepiece should be +5 cm.

Answer

+200 cm

Answer

-5 cm

Answer

-200 cm

Answer

+5 cm

Related Questionsin Physics

More from CUET UG

Browse CUET Questions by Subject

Practice More CUET UG Questions