Ray Optics and ...

The focal length of objective and eye lens of a microscope are $$4\ cm$$ and $$8\ cm$$ respectively. If the least distance of distinct vision is $$24\ cm$$ and object distance is $$4.5\ cm$$ from the objective lens, then the magnifying power of the microscope will be   

One side of a glass slab is silvered as shown. A ray of light is incident on the order side at the angle of incidence $$i = {45^0}$$. Refractive index of glass is given as 1.5. The deviation of the ray of light from its initial path when it comes out of the slab is 

If two mirrors are inclined at some angle $$\theta$$. An object is placed between the mirrors and there are 5 images formed for an object, then $$\theta$$ is may be

A plane mirror produces a magnification of

Light of frequency $$5\times 10^{14}\ Hz$$ is travelling in a medium of refractive index $$1.5$$. What is its wavelength ? $$(c=3\times 10^{8}\ ms^{-1})$$

Three glass prisms A, B and C of same refractive indices are placed in contact with each other as shown in fig. 13.77 with no air gap between the prisms. A monochromatic ray of light OP passes through the prism assemble and emerges as QR. The condition of minimum deviation are satisfied in the prisms:

Three glass prisms A, B and C of same refractive are placed in contact with each other as shown on Fig. 13.77 with no air gap between the prisms. A monochromatic ray of light OP passes through the prism assembly and emerges as QR. The conditions of minimum deviation are satisfied in the prisms:

A fish is a little away below the surface of a table. If the critical angle is $$49^o$$, then the fish could see things above the water surface within an angular angle of

A convex lens forms a real image of a point object placed on its principle axis.If the upper half of the lens is painted black,the image will- 

When a glass rod is immersed in a liquid of same refractive index, it will _____.