Physics Test 17...

In the figure shown a convex mirror of radius of curvature 20 cm is shown. An object O is placed in front of this mirror. Its ray diagram is shown. How many mistakes are there in the ray diagram (AB is its  principal axis):

For a real object, all of the following statements are correct except :

In the figure shown find the total magnification after two successive reflections first on M₁ & then on M₂

A particle revolves in clockwise direction (as seen from point A) in a circle C of radius 1 cm and completes one revolution in 2 sec. The axis of the circle and the principal axis of the mirror M coincide. Call it AB. The radius of curvature of the mirror is 20 cm. Then the direction of  revolution (as seen from A) of the image of the particle and its speed is

The relative refractive index of glass with respect to a material is 0.9 and the absolute refractive index of glass is 1.512. The refractive index of the material is

A lens of focal length 20.0 cm and aperture radius 2.0 cm is placed at a distance 30.0 cm from a point source of light. On the other side a screen is placed at a distance 50.0 cm from the lens. The radius of spot of light formed on screen is. (Neglect spherical abberation through lens)

A convex lens is cut into two parts in different ways that are arranged in four manners, as shown. Which arrangement will give maximum optical power ?

A ray of light is incident at an angle of incidence 45º on an equilateral prism and emerge at an angle 45º then the refractive index of the medium of the prism is :

The distance of nth bright fringe to the (n+1)th dark fringe in Young's experiment is equal to:

In a Young's double slit experiment, d = 1 mm, λ = 6000 Å and D = 1 m (where d, λ and D have usual meaning). Each of slit individually produces same intensity on the screen. The minimum distance between two points on the screen having 75 % intensity of the maximum intensity is :