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
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
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
/
Greater deviation
Same deviation
No deviation
Total internal reflection
/
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
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
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