CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Minimum Deviation

Dispersive po...

Question

Dispersive power of a prism decreases with the increase in prism angle.

A

True

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

False

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B False
Dispersive Power $= \frac{A n g u l a r D i s p e r s i o n}{M e a n D e v i a t i o n} = ω$
Mean Deviation $= S = (μ - 1) A$ .
Angular Dispersion $= S_{v} - S_{r} = (μ_{v} - μ_{r}) = A$
$ω = \frac{S_{v} - S_{r}}{S} = \frac{(μ_{v} - μ_{r}) A}{(μ - 1) A}$
$ω = (\frac{μ_{v} - μ_{r}}{μ - 1})$ .
Hence, dispersive power cannot depend on prism angle.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Dispersive power of a prism______________ with the increase in prism angle.

Q. If a glass prism is dipped in water, its dispersive power
(a) increases
(b) decreases
(c) does not change
(d) may increase or decrease depending on whether the angle of the prism is less than or greater than 60°

Q. If a prism of dispersive power

0.021

and refractive index

1.53

forms an achromatic combination with a prism having the prism of angle

{4.2}^{\circ}

, dispersive power

0.045

and refractive index

1.65,

then what is the resultant deviation of the combination?

Q. A prism whose angular dispersion is

30^{o}

deviates light by

60^{o}

. The dispersive power of the prism is:

Q. The angle of deviation decreases with increase in the angle of prism.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Refraction through Prism

PHYSICS

Watch in App

explore_more_icon

Explore more

Minimum Deviation

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon