English

What is a Dispersion of Light - Physics

Advertisements
Advertisements

Question

What is a dispersion of light

Advertisements

Solution

Dispersion of light is the phenomenon of splitting of light into its component colours.

When a narrow beam of sunlight is incident on a glass prism, the emergent light splits into seven colours, namely, violet (V), indigo (I), blue (B), green (G), yellow (Y), orange (O) and red (R).

shaalaa.com
  Is there an error in this question or solution?
2015-2016 (March) Delhi Set 1

Video TutorialsVIEW ALL [2]

RELATED QUESTIONS

Plot a graph to show the variation of the angle of deviation as a function of the angle of incidence for light passing through a prism. Derive an expression for the refractive index of the prism in terms of angle of minimum deviation and angle of the prism.


A ray PQ incident normally on the refracting face BA is refracted in the prism BAC made of material of refractive index 1.5. Complete the path of ray through the prism. From which face will the ray emerge? Justify your answer.


A ray of light incident normally on one face of a right isosceles prism is totally reflected, as shown in fig. What must be the minimum value of refractive index of glass? Give relevant calculations.


Give the formula that can be used to determine refractive index of materials of a prism in minimum deviation condition ?


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


A thin prism of angle 6.0°, ω = 0.07 and μy = 1.50 is combined with another thin prism having ω = 0.08 and μy = 1.60. The combination produces no deviation in the mean ray. (a) Find the angle of the second prism. (b) Find the net angular dispersion produced by the combination when a beam of white light passes through it. (c) If the prisms are similarly directed, what will be the deviation in the mean ray? (d) Find the angular dispersion in the situation described in (c).


Calculate dispersive power of a transparent material given : nv = 1.56, nr = 1.54, ny = 1.55. 


 What is meant by the dispersive power of transparent material?


An equilateral glass prism has a refractive index 1.6 in the air. Calculate the angle of minimum deviation of the prism, when kept in a medium of refractive index `4sqrt(2)"/"5.`


When a ray of white light is incident obliquely on the first surface of a prism, then ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×