Question

in the figure given below.(i)the deviation produced and (ii) the instrument where this action of the prism is put into use is​

Answer 1

Answer:

Deviation is given by,

        δ=(μ−1)×A

means deviation depends on μ directly.

and μ is inversely proportional to λ.

Here, m∠QPR=50∘

Also ∠PQO=∠PRO=90∘  known fact

∴∠PQO+∠PRO+∠QPR+∠QOR=360∘→ sum of all Angles

∴90∘+90∘+50∘+∠QOR=360∘

m∠QOR=360−90−90−50

∴∠QOR=130∘

Now,

∠QSR=21(∠QOR)→ angle substended at center is double by same arc at circumference

∴∠QSR=21×130∘

∴m∠QSR=65∘

∴∠QSR=65∘