Home
Class 12
PHYSICS
A prism of a certain angle deviates the ...

A prism of a certain angle deviates the red and blue rays by `8^@` and `12^@` respectively. Another prism of the same angle deviates the red and blue rays by `10^@` and `14^@` respectively. The prisms are small angled and made of different materials. The dispersive powers of the materials of the prisms are in the ratio

A

`5:6`

B

`9:11`

C

`6:5`

D

`11:9`

Text Solution

Verified by Experts

The correct Answer is:
C
Dispersive powe `(omega_(1)) = (delta_(B) - delta_(R ))/(delta_(Y)) = (12 -8)/( (12 + 8)/(2) ) `
`rArr " " omega_(1) = (4)/(10)`
`omega_(2) = (delta_(B) - delta_(R ))/( (delta_(B) + delta_(R ))/(2) ) = (14- 10)/((14 + 10)/(2) ) = (4)/(12) = (1)/(3)`
`therefore " " (omega_(1))/(omega_(2)) = (4 xx 3)/(10) = 1.2 = (6)/(5)` .
Promotional Banner

Similar Questions

Explore conceptually related problems

A glass prism deviates the red and blue colour rays through 8^(@) and 10^(@) , respectively. A second prism of equal refracting angle deviates them through 10^(@) and 12^(@) respectively. Calculate the ratio of their dispersive powers.

A glass prism A deviates the red and blue rays through 10^(@) and 12^(@) respectively . A second prism (B) deviates them through 8^(@) and 10^(@) respectively . What is the ratio of their dispersive powers ?

Two small angled prisms A and B deviate the blue rays by 7 0 and 9 0 and the red rays by 5 0 and 7 0 respectively. Which prism has a greater . p dispersive power ?

Two small angled prisms A and B deviate the blue rays by 6^(@) and 8^(@) and the red rays by 4^(@) and 6^(@) respectively. Which prism has a greater dispersive power ?

Compare the dispersive powers of two prisms if one of them deviates the blue and red rays through 10^(@) and 6^(@) respectively and the second prism through 8^(@) and 4.5^(@)

A thin prism deviates an incident ray by 3.2^@ . If the refractive index of the prism is 2.6 then the angle of prism is

The angle of minimum deviation for prism of angle pi//3 is pi//6 . The refractive index of the material of the prism is.

The refractive angle of a prism is 60^(@) . What is the angle of minimum deviation, if the refractive index of the material of the prism is sqrt2 ?

The difference between angle of minimum deviation of violet and red rays in the spectrum of white light from a prism is 2^(@) . If angle of minimum deviation of mean ray is 48^(@) , the dispersive power of material of the prism is