thin prism

A thin prism has an apex angle of 5^o & refractive index of 1.6, so the deviation angle of light through it equals

• 3⁰

• 5⁰

• 6⁰

• 8⁰

if the summation of the refractive indices of blue & red light of a thin prism is 3.1 and the difference between them 0.1, so the dispersive power of the prism is:

• 1.1

• 0.2

• 0.18

• 0.14

deviation angle is the difference between the deviation angles of red & blue lights in the prism

• true

• false

(∝_∘) _{y = (∝∘)b + (∝∘)r /2}

_{is the equation for the.......}

• average deviation of yellow light

• dispersive power

• angular dispersion

• average refractive index of yellow light

Deviation angle in the thin prism Depends on

• the 1st angle of incidence

• the wavelength of the incident light. λ

• the referactive index for both red &blue lights

...............not always in the position of minimum deviation

• thin prism

• normal prism

• deviation angle

• angular dispersion

to disperse the white light to its components, we must use

• normal prism

• thin prism

• rectangular glass block

• mirror