NEET · Physics · STD 12 - 9. Ray optics and optical instruments
Light travels a distance \(x\) in time \(t_1\) in air and \(10 x\) in time \(t_2\) in another denser medium. What is the critical angle for this medium?
- A \(\sin ^{-1}\left(\frac{10 t_1}{t_2}\right)\)
- B \(\sin ^{-1}\left(\frac{t_2}{t_1}\right)\)
- C \(\sin ^{-1}\left(\frac{10 t_2}{t_1}\right)\)
- D \(\sin ^{-1}\left(\frac{t_1}{10 t_2}\right)\)
Answer & Solution
Correct Answer
(A) \(\sin ^{-1}\left(\frac{10 t_1}{t_2}\right)\)
Step-by-step Solution
Detailed explanation
Speed of light is air \(V_1=\frac{x}{t_1}\) speed of light is a medium \(V_2=\frac{10 x}{t_2}\)
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