Revision Quiz on Geometrical Optics - II for JEE & BITSAT Exams

Question 1

Monochromatic light is incident on a glass prism of angle A. If the refractive index of the material of the prism is

a ray, incident at an angle 6, on the face AB would get transmitted through the face AC of the prism provided:

Question 2

A point object is placed 20 cm left of a convex lens of focal length f=5cm cm (see the figure). The lens is made to oscillate with small amplitude A along the horizontal axis. The image of the object will also oscillate along the axis with

Question 3

A point source of light is moving at a rate of 2 cm-s^-1 towards a thin convex lens of focal length 10 cm along its optical axis. When the source is 15 cm away from the lens the image is moving at

Question 4

A concave lens made of material of refractive index 1.6 is immersed in a medium of refractive index 2.0. The two surfaces of the concave lens have the same radius of curvature 0.2 m. The lens will behave as a

Question 5

A simple telescope consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object is such a way that parallel rays come out from the eye lens. If the object subtends an angle 2 ° at the objective, the angular width of the image

Question 6

If ε₀ and μ₀ are the permittivity and permeability of free space and ε and μ are the corresponding quantities for a medium, then refractive index of the medium is

Question 7

A planoconvex lens has a maximum thickness of 6 cm. When placed on a horizontal table with the curved surface in contact with the table surface, the apparent depth of the bottom most point of the lens is found to be 4 cm. If the lens is inverted such that the plane face of the lens is in contact with the surface of the table, the apparent depth of the center of the plane face is found to be $Description: E:\KCET-1-Feb\KARNATAKA-CET-2011_files\image093.png$ cm. The radius of curvature of the lens is

Question 8

The speed of light in media M₁ and M₂ are 1.5 × 10⁸ ms^-1 and 2 × 10⁸ ms^-1 respectively. A ray traels from medium M₁ to the medium M₂ with an angle of incidence θ is

Question 9

A convex lens of focal length 15 cm is placed coaxially in front of a convex mirror. The lens is 5 cm from the pole of the mirror. When an object is placed on the axis at a distance of 20 cm from the lens, it is found that the image coincides with the object. Calculate the radius of curvature of the mirror - (consider all optical event)

Question 10

An object 2.4 m in front of a lens forms a sharp image on a film 12 cm behind the lens. A glass plate 1 cm thick, of refractive index 1.50 is interposed between lens and film with its plane faces parallel to film. At what distance (from lens) should object be shifted to be in sharp focus on film?

Question 11

A transparent solid cylindrical rod has a refractive index of

. It is surrounded by air. A light ray is incident at the mid–point of one end of the rod as shown in the figure.

The incident angle θ for which the light ray grazes along the wall of the rod is:

Question 12

An initially parallel cylindrical beam travels in a medium of refractive index

, where μ₀ and μ₂ are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius. The speed of light in the medium is

Question 13

If two mirrors are kept at 60° to each other, then the number of images formed by them is:

Question 14

Assuming human pupil to have a radius of 0.25 cm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that human eye can resolve at 500 nm wavelength is :

Question 15

A converging lens of focal length f is placed at a distance 0.3 m from an object to produce an image on a screen 0.9 m from the lens. With the object and the screen in the same positions , an image of the object could also be produced on the screen by placing a converging lens of focal length