Recent questions tagged dispersion and spectra

+3 votes

1 answer

What is dispersive power? Find the necessary conditions for obtaining deviation without dispersion by two thin prisms.

asked Mar 28, 2019 in JEE by kratos

+3 votes

1 answer

The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown.

asked Mar 19, 2019 in JEE by kratos

+2 votes

1 answer

Two lens in contact form an achromatic combination. Their focal lengths are in the ratio of 2 : 3.

asked Mar 15, 2019 in Class 12 by kratos

+2 votes

1 answer

An isosceles glass prism with base angles 40 is champed over a tray of water in a position such that the base is just dipped in water.

asked Mar 8, 2019 in Class 11 by kratos

+1 vote

1 answer

Two parallel rays of Red and Violet travelling through air, meet the air-glass boundary as shown in the above figure :

asked Mar 7, 2019 in Class 12 by kratos

+2 votes

1 answer

Which of the following quantities related to a lens depend on the wavelength or wavelengths of the incident light ?

asked Mar 1, 2019 in Class 11 by kratos

+2 votes

1 answer

The refractive indices of crown glass for blue and red lights are 1.51 and 1.49 respectively and those of the

asked Feb 21, 2019 in JEE by kratos

+3 votes

1 answer

What does this mean ~~ The crown of the tree.

asked Feb 16, 2019 in JEE by kratos

+2 votes

1 answer

A prism can produce a minimum deviation * in a light beam. If three such prisms are combined, the minimum deviation that

asked Feb 15, 2019 in Class 11 by kratos

+1 vote

1 answer

The angular dispersion produced by a prism

asked Jan 16, 2019 in JEE by kratos

+1 vote

1 answer

Find the angular dispersion produced by a thin prism of 18 degree having refractive index for red light 1.56 and for violet light 1.68

asked Jan 14, 2019 in Class 12 by kratos

+3 votes

1 answer

The focal length of a converging lens are f_v and f_r for violet and red light respectively.

asked Dec 13, 2018 in Class 11 by kratos

+1 vote

1 answer

In producing a pure spectrum, the incident light is passed through a narrow slit placed in the focal plane of an achromatic lens because a narrow slit

asked Dec 12, 2018 in Class 11 by kratos

+1 vote

1 answer

By properly combining two prisms made of different materials, it is not possible to

asked Dec 11, 2018 in JEE by kratos

+3 votes

1 answer

Which of the following quantities increase when wavelength is increased ? Consider only the magnitudes.

asked Nov 30, 2018 in Class 11 by kratos

+3 votes

1 answer

If red light and violet light rays are of focal lengths FR and FV respectively, then which one of the following is true ?

asked Nov 18, 2018 in Class 12 by kratos

+1 vote

1 answer

By properly combining two prisms made of different materials, it is possible to (a) have dispersion without average deviation

asked Nov 14, 2018 in Class 11 by kratos

+3 votes

1 answer

Two prisms of identical geometrical shape are combined with their refracting angles oppositely directed.

asked Nov 10, 2018 in Class 11 by kratos

+2 votes

1 answer

A narrow beam of white light goes through a slab having parallel faces. (a) The light never splits in different colours.

asked Nov 8, 2018 in JEE by kratos

+3 votes

1 answer

If a glass prism is dipped in water, its dispersive power (a) increases (b) decreases

asked Oct 31, 2018 in JEE by kratos

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