The refractive index of a given piece of transparent quartz is the greatest for
The refractive index of material varies with wavelength according to the Cauchy’s relation is
When a light ray travels into a single medium then refractive index is
If the critical angle for the medium of a prism is C and the angle of the prism is A, then there will be no emergent ray when
(A) (B) (C) (D)
When a ray of light is refracted by a prism such that the angle of deviation is minimum, then
A ray falls on a prism ABC (AB = BC) and travels as shown in figure. The minimum refractive index of the prism material should be
In question no.13, the angle of minimum deviation is nearly
The refractive index of flint glass for blue line is 1.6333 and red line is 1.6161, then dispersive power of the glass is :
The nature of sun’s spectrum is
If the refractive indices of crown glass for red, yellow and violet colours are 1.5140, 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive power for crown and flint glass are respectively
Indicate the correct statement in the following
White light is passed through a prism of angle 5. If the refractive indices for the red and blue colours are 1.641 and 1.659 respectively, what is the angle of dispersion between them ?
The refractive indices of red, violet and yellow light are respectively 1.42, 1.62 and 1.50. The dispersive power of the medium will be
A flint glass prism and a crown glass prism of angles A’ and A respectively are to be combined in such a manner that there is dispersion without deviation. For this to occur the ratio of A’/A must be :
A prism has a refracting angle of 60º. When placed in the position of minimum deviation, it produces a deviation of 30º. Then the angle of incidence is
In question no.1, the angle of refraction is
In question no. 1, the angle of deviation at each face is
In question no.1 the refractive index of the material of the prism is
The dispersion of light in a medium implies that
Which of the following diagrams shows correctly the dispersion of white light by a prism ?
If for a given prism the angle of incidence is changed from 0° to 90° the angle of deviation
The maximum value of index of refraction of a material of a prism which allows the passage of light through it when the refracting angle of the prism is A is
An equilateral prism is placed on the prism table of a spectrometer in the position of minimum deviation. If the angle of incidence is 60º, the angle of deviation of the ray is :
Statement I : White light gets dispersed when passed through a prism.
Statement II: Different colours are deviated through different angles due to which white light splits.
ABC is a right angled prism kept in air. A ray (1) is incident on the face AB along the normal. Refractive index of the material of prism is the minimum value that will be required so that ray (1) undergoes total internal reflection at the face AC.
Another ray (2) is incident on the face AB such that it emerges from face AC along the normal to AC. A third ray (3) falls on the face BC and emerges from face AC such that its angle of emergence is the same as that of incidence. Assuming light (1), (2) and (3) to have the same frequency. Answer the following questions :
Refractive index of the material of the prism is -
Deviation suffered by ray (2) is -
Angle of incidence of ray (3) is -
For two given statements : (1) A prism can produce a minimum deviation D in a light ray. If three such prism are combined, the minimum deviation that can be obtained with this combination is 3 D. (2) A combination of two prisms produce deviation as well as dispersion when monochromatic light is incident upon it.