Which of the following are illustrations of total internal reflection?
1) Shining of air bubble in water
2) Sparkling of diamond
3) Increase in duration of sun’s visibility
4) Mirage and looming
5) Ophthalmoscope
Choose the appropriate code:
1, 2, 3 and 4 only
1 , 2 and 5 only
1, 2, 3 and 5 only
All of the above
Explanation:
Total Internal Reflection:
• If light is propagating from denser medium towards the rarer medium and angle of incidence is more than critical angle, then the light incident on the boundary is reflected back in the denser medium, obeying the laws of reflection. This phenomenon is called total internal reflection as total light energy is reflected, no part is absorbed or transmitted.
• For total internal reflection,
1) Light must be propagating from denser to rarer medium
2) Angle of incidence must exceed the critical angle
Total Internal Reflection:
• If light is propagating from denser medium towards the rarer medium and angle of incidence is more than critical angle, then the light incident on the boundary is reflected back in the denser medium, obeying the laws of reflection. This phenomenon is called total internal reflection as total light energy is reflected, no part is absorbed or transmitted.
• For total internal reflection,
1) Light must be propagating from denser to rarer medium
2) Angle of incidence must exceed the critical angle