Total internal reflection of light is possible when light enters fromSelect an answerAAir to glassBVacuum to airCAir to waterDWater to air
Question
Total internal reflection of light is possible when light enters from
Select an answer
A. Air to glass
B. Vacuum to air
C. Air to water
D. Water to air
Solution
Total internal reflection of light is possible when light travels from a medium with a higher refractive index to a medium with a lower refractive index, and the angle of incidence is greater than the critical angle.
Looking at the options:
A) Air to glass - This is not a transition from a higher to a lower refractive index, so total internal reflection is not possible.
B) Vacuum to air - This is also not a transition from a higher to a lower refractive index, so total internal reflection is not possible.
C) Air to water - This is not a transition from a higher to a lower refractive index, so total internal reflection is not possible.
D) Water to air - This is a transition from a higher refractive index (water) to a lower refractive index (air), so total internal reflection is possible if the angle of incidence is greater than the critical angle.
So, the correct answer is D) Water to air.
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