Question

prism having refracting angle less than 10°(A<10°) are called a) angular dispersion, b) thin prism , c) dispresive power, d) minimum deviation​

Answer 1

Answer:

Here, refracting angle is A=10

0

Refracting index for red light is =1.627

Refracting index for violet light is =1.648

Deviation of light δ=(μ−1) A

Deviation of light

δ

violet

−δ

red

(μ

violet

−μ

red

)A

(1.648−1.627)10

(0.021)×10

0.21

0

Answer 2

Thin prism

• It is a glass, triangular prism.  
• It has an apex angle of fewer than 10 degrees. This prism is always fixed at the angle of minimum deviation.  
• The prism formula for a thin prism is given; when both of these little numbers are rounded off and the equation is rearranged.

Formula,

μ = $\frac{sin\frac{A+δ_{m} } }{2} }{sin\frac{A}{2} }$

μ- refractive index

$δ_{m}$- minimum deviation

A- apex angle