Ray Optics Test...

A convex lens made up of a material of refractive index n₁ is immersed in a medium of refractive index n₂ as shown in the figure. The relation between n₁ and n₂ is___________.

Two Plano – convex lenses of radius of curvature R and refractive index n = 1.5 will have equivalent focal length equal to R, when they are placed__________.

A double convex lens made of glass of refractive index 1.6 has radius of curvature 15 cm each. The focal length of this lens when immersed in a fluid of refractive index 1.63 is____________.

One ray of light suffers minimum deviation in an equilateral prism P additional prism Q and R of identical shown in figure. The ray will now suffer____________.

Which of the following colours is scattered minimum ?

Angle of minimum devaition for a prism refractive index 1.5 is equal to the angle of the prism Then the angle of prism___________(given sin 48^o 36\' = 0.75)

In a thin prism of glass (a_ng = 1.5) which of the following relation between the angle of minimum deviation δ_m and the angle of refraction r will be correct ?

An observer look at a tree of height 10 meters away with a telescope of magnifying power 10. To him, the tree appears______________.

A normal person wants to see two pillars at a distant 11 km away separately. The distance between two pillars should be approximately_________.

When the length of microscope tube increases, its magnifying power________.