Q. 115.0( 1 Vote )

# The equation of refraction at a spherical surface is

Taking, show that this equation leads to the equation

for refraction at a plane surface.

Answer :

Now, as ,

0

So, =

So,

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If three identical prisms are combined, is it possible to pass a beam that emerges undeviated and undispersed?

HC Verma - Concepts of Physics Part 1Suggest a method to produce a rainbow in your house.

HC Verma - Concepts of Physics Part 1Can the dispersive power ω=__μ _{v}-μ_{r}__ be negative? What is the sign of ω if a hollow prism μ-1 is immersed into water?

Locate the image of the point *P* as seen by the eye in the figure (18-E5).

An object *P* is focused by a microscope *M*. A glass slab of thickness 2.1 cm is introduced between *P* and *M*. If the refractive index of the slab is 1.5, by what distance should the microscope be shifted to focus the object again?

A light ray falling at an angle of 45° with the surface of a clean slab of ice of thickness 1.00 m is refracted into it at an angle of 30°. Calculate the time taken by the light rays to cross the slab. Speed of light in vacuum = 3 x 10^{8} ms^{-1}.

Consider the following two statements:

(i) Line spectra contain information about atoms.

(ii) Band spectra contain information about molecules.

HC Verma - Concepts of Physics Part 1

The equation ω=__μ _{v}-μ_{r}__ was derived for a prism having small refracting angle. Is it also valid for a prism of large refracting angle? Is it also valid for a glass slab or a glass sphere?

“Monochromatic light should be used to produce pure spectrum”. Comment on this statement.

HC Verma - Concepts of Physics Part 1