Total Internal Reflection
Physics ⇒ Light and Optics
Total Internal Reflection starts at 10 and continues till grade 12.
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See sample questions for grade 11
A light ray passes from diamond (n = 2.42) to air (n = 1.0). Calculate the critical angle for this interface.
Define the term 'critical angle' in the context of total internal reflection.
Describe how total internal reflection is used in endoscopes for medical examination.
Describe the path of a light ray inside an optical fiber and explain the role of total internal reflection.
Explain why a fish in water cannot see objects above the water surface beyond a certain angle.
Explain why prisms are preferred over mirrors in optical instruments for reflecting light.
Explain why the sky appears blue when viewed from underwater at certain angles.
Explain why total internal reflection does not occur when light travels from air to water.
If the critical angle for a glass-water interface is 60°, what is the refractive index of glass with respect to water? (Use sin c = n2/n1)
If the refractive index of glass is 1.5 and that of air is 1.0, calculate the critical angle for total internal reflection at the glass-air interface. (Use sin c = n2/n1)
State two practical applications of total internal reflection.
The critical angle for a certain medium is 30°. What is the refractive index of the medium with respect to air? (Use sin c = n2/n1, n2 = 1 for air)
What is total internal reflection?
