JEE Mains · Physics · STD 12 - 9. Ray optics and optical instruments
A green light is incident from the water to the air - water interface at the critical angle \((\theta)\). Select the correct statement .
- A The spectrum of visible light whose fre quency is less than that of green light will come out to the air medium
- B The spectrum of visible light whose fre quency is more than that of green light will come out to the air medium.
- C The entire spectrum of visible light will come out of the water at various angles to the normal.
- D The entire spectrum of visible light will come out of the water at an angle of \(90°\) to the normal.
Answer & Solution
Correct Answer
(A) The spectrum of visible light whose fre quency is less than that of green light will come out to the air medium
Step-by-step Solution
Detailed explanation
For critical angle \(\theta_{\mathrm{c}}\) , \(\sin \theta_{c}=\frac{1}{\mu}\) For greater wavelength or lesser frequency \(\mu\) is less. So, critical angle would be more. So, they will not suffer reflection and come out at angles less then \(90^o\).
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