Ray Optics Test...

A fish 10 cm long is 4 cm under the water level. Its length when viewed vertically above will be

A well cut diamond appears bright because

A ray of light travelling inside a rectangular glass block of refractive index √2 is incident on the glass-air surface at an angle of incidence of 45º. The refractive index of air is one. Under these conditions, the ray

A ray of light passes from vacuum into a medium of refractive index µ, the angle of incidence is found to be twice the angle of refraction. Then the angle of incidence is

A convex lens of focal length f produces a real image n times the size of an object, then the distance of the object from the lens is

An object is placed at a distance of f/2 from a convex lens. The image will be

A lens of power +2 diopter is placed in contact with a lens of Power -1 diopter. The combination will behave like

A convex lens of crown glass (µ = 1.525) will act as a diverging lens if it is immersed in

A ray of light, incident on one face of an equilateral prism undergoes total internal reflection at another face. If the refractive index of the material of prism is √2 , then angle of refraction (r₂) at another face will be

A point source of light is placed 4 m below the surface of water of refractive index 5/3. The minimum diameter of a disc, which should be placed over source, on surface of water to cut off all light coming out of water is