A glass prism with a refracting angle of 60∘ has a refractive index 1.52 for red and 1.6 for violet light. A beam of white light is incident on one face at an angle of incidence, which gives minimum deviation for red light. If the angle of incidence is 50∘ and minimum deviation for red light is 40∘, find the angular dispersion of the spectrum.[Given: sin(50∘)=0.760, sin(31.6∘)=0.520, sin(28.4∘)=0.475, sin 56∘=0.832, π=227]

A glass prism with a refracting angle of 60∘ has a refractive index

1.	A glass prism with a refracting angle of 60∘ has a refractive index 1.52 for red and 1.6 for violet light. A beam of white light is incident on one face at an angle of incidence, which gives minimum deviation for red light. If the angle of incidence is 50∘ and minimum deviation for red light is 40∘, find the angular dispersion of the spectrum.[Given: sin(50∘)=0.760, sin(31.6∘)=0.520, sin(28.4∘)=0.475, sin 56∘=0.832, π=227]
Answer» A glass prism with a refracting angle of $60^{\circ}$ has a refractive index $1.52$ for red and $1.6$ for violet light. A beam of white light is incident on one face at an angle of incidence, which gives minimum deviation for red light. If the angle of incidence is $50^{\circ}$ and minimum deviation for red light is $40^{\circ}$ , find the angular dispersion of the spectrum. [Given: $sin (50^{\circ}) = 0.760, sin ({31.6}^{\circ}) = 0.520, sin ({28.4}^{\circ}) = 0.475, sin 56^{\circ} = 0.832, π = \frac{22}{7}$ ]