Question

dispersive power of crown glass? Given that µ_v = 1.5230, µ_r = 1.5145

Options

• 2°

• 3°

• 0.0163°

• 2.5°

Answer 1

0.0163°

Explanation:

µ_v = 1.5230, µ_r = 1.5145

Here, negative sign showing the volume of the gas is decreasing (ω) = ?

Mean refractive index (µ) = `(mu_"v"+mu_"r")/2`

= `(1.5230+1.5145)/2`

µ = 1.5187 

ω = `(mu_"v"-mu_"r")/(mu-1)`

=  `(1.5230+1.5145)/(1.5187-1)`

= `0.0085/0.5187`

= 0.0163