# PHYSICS: DISPERSION Online Test

The refractive index of a particular material is 1.67 for blue light, 1.65 for yellow light and 1.63 for red light. The dispersive power of the material is ____.
0.0615
0.024
0.031
1.60
/
PQ is horizontal
QR is horizontal
RS is horizontal
Either PQ or RS is horizontal
A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red and green ray emerge from ____.
two points propagating in two different directions
two points propagating in two parallel directions
one point propagating in two different directions
one point propagating in the same directions
/
Greater deviation
Same deviation
No deviation
Total internal reflection
A parallel beam of white light falls on a convex lens. Images of blue, yellow and red light are formed on other side of the lens at a distance of 0.20 m, 0.205 m and 0.214 m respectively. The dispersive power of the material of the lens is ____.
619/1000
9/200
14/205
5/214
/
A
B
C
D
A prism of refractive index  has a refracting angle of 60o. At what angle a ray must be incident on it so that it suffers a minimum deviation?
45o
60o
90o
180o
A convex lens, a glass slab, a glass prism and a solid sphere all are made of the same glass, the dispersive power is ____.
in the glass slab and prism
in the lens and solid sphere
only in prism
in all the four
If the refractive angles of two prisms made of crown glass are 10o and 20o respectively, then the ratio of their colour deviation powers is ____.
1 : 1
2 : 1
4 : 1
1 : 2
Three prisms 1, 2 and 3 have the prism angle A = 60o, but their refractive indices are respectively 1.4, 1.5 and 1.6. If (1, (2, (3 be their respective angles of deviation then ____.
(3 > (2 > (1
(1 > (2 > (3
(1 = (2 = (3
(2 > (1 > (3
When a glass prism of refracting angle 60o is immersed in a liquid its angle of minimum deviation is 30o. The critical angle of glass with respect to the liquid medium is ____.
42o
45 o
50 o
52 o
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Description:

Prisms , dispersive power,refractive index are few topics included in this test

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Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE 87 Members Recommend
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