The variation of refractive index of a crown glass thin prism with wavelenght of the incident light is shown. Which of the following graphs is the correct one if `D_(m)` is the angle of minimum deviaton ?
A
B
C
D
Text Solution
Verified by Experts
The correct Answer is:
B
`delta=A(mu-1)` So, `delta` decreases as `mu` decreases .
In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations delta_(m) and angle of prism r will be correct?
(i) Plot a graph to show variation of the angle of deviation as function of angle of incidence for light passing through a prism. Derive an expression for refractive index of the prism in terms of angle of minimum deviation and angles of prism. (ii) What is dispersion of light ? Why is its cause ? (iii) 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
(a) Deduce the expression, by drawing a suitable ray diagram, for the refractive index of a triangular glass prisms in terms of the angle of minimum deviation (D) and the angle of prism (A). Draw a plot showing the variation of the angle of deviation with the angle of incidence. (b) Calculate the value of the angle of incidence when a ray of light incident on one face of an equilateral glass prism produces the emergent ray, which just grazes along the adjacent face. Refractive index of prism is sqrt2
(a) Plot a graph for angle of deviation as a function of angle of incidence for a triangular prism. (b) Derive the relation for the refractive index of the prism in terms of the angle of minimum deviation and angle of prism.
A ray of light is normally incident on one face of an equilateral glass prism. Answer the following : (a) What is the angle of incidence on the first face of the prism? (b) What is the angle of refraction from the first face of the prism ? (c) What will be the angle of incidence at the second face of the prism ? (d) Will the light ray suffer minimum deviation by the prism ?
Define refractive index of a transparent medium. A ray of light passes through a triangular prism. Plot a graph showing the variation of angle of deviation with the angle of incidence.
A prism of refractive index m and angle A is placed in the minimum deviation position. If the angle of minimum deviation is A , then the value of A in terms of m is
A prism of apex angle A=60^@ has the refractive index mu=sqrt2. The angle of incidence for minimum deviation is
How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced with red light?
How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced with red light?
VMC MODULES ENGLISH-JEE Main Revision Test-6 | JEE-2020 -PHYSICS
