AP EAPCET 2024 - 23th May Morning Shift | Ray Optics Question 1 | Physics

When a convex lens is immersed in two different liquids of refractive indices 1.25 and 1.5 , the ratio of the focal lengths of the lens is $5: 16$. The refractive index of the material of the lens is

1.55

1.5

1.65

1.6

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-0

When a convex lens is immersed in a liquid of refractive index equal to $80 \%$ of the refractive index of the material of the lens. The focal length of the lens increases by $100 \%$. The refractive index of the liquid is

1.27

1.2

1.33

1.4

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

A person can see objects clearly when they lie between 40 cm and 400 cm from his eye. In order to increase the maximum distance of distant vision to infinity the type of lens and power of correction lens required respectively, are

convex, 0.25 D

concave, -0.25 D

concave, -0.5 D

concave, 0.5 D

AP EAPCET 2024 - 21th May Evening Shift

MCQ (Single Correct Answer)

-0

The focal length of the objective lens of a telescope is 30 cm and that of its eye lens is 3 cm . It is focussed on a scale at a distance 2 m from it. The distance of objective lens from eye lens to see the clear image is

38.3 cm

48.3 cm

58.3 cm

22.5 cm

AP EAPCET Subjects