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The velocity of a certain monochromatic light, in a given transparent medium is `2.25xx 10^(8)m//s`. What is the (a) critical angle of incidence, (b) polarising angle for this medium? |
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Answer» `"Here "v=2.25xx10^(8)m//s` Speed of light in vaccum `c=3xx10^(8)m//s` `" "mu=(c)/(v)=(3xx10^(8))/(2.55xx10^(8))underset(8x to 0)lim=1.33` (a) If C is the critical angle, then `mu=(1)/(Sin C)` `" "1.33=(1)/(Sin C)" ""Sin C"=(1)/(1.33)=0.75` (b) If `beta` is the polarising angle then, `tan i_(beta)=mu` `tan i_(beta)=1.33=tan53.06^(@) Rightarrow i_(beta)=53.06^(@)` |
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