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 12
A light ray in a medium with refractive index 1.5 is incident at 45° on the interface with air (n = 1.0). Will total internal reflection occur?
A light ray in a medium with refractive index n1 strikes the boundary with a medium of refractive index n2 (n1 > n2) at the critical angle. What is the angle of refraction?
A light ray in water (n = 1.33) strikes the water-air interface at 50°. Will it undergo total internal reflection?
A light ray passes from glass (n = 1.5) into water (n = 1.33). Calculate the critical angle for this interface.
A ray of light is incident at 60° on the surface of a glass block (n = 1.5) in air. Will total internal reflection occur?
Calculate the critical angle for a diamond (n = 2.42) to air (n = 1.00) interface. (Give your answer to two decimal places.)
Describe one real-life application of total internal reflection other than optical fibers.
Describe the role of total internal reflection in the working of a prism used in binoculars.
Explain why a fish in water cannot see objects above the water surface beyond a certain angle.
Explain why diamonds sparkle more than other transparent materials.
Explain why optical fibers must have a core with a higher refractive index than the cladding.
If the critical angle for a certain glass is 40°, what is the refractive index of the glass? (Refractive index of air = 1.00)
If the critical angle for glass-air interface is 42°, what happens when a light ray in glass strikes the interface at 50°?
If the refractive index of medium 1 is 1.6 and medium 2 is 1.2, what is the critical angle for total internal reflection at their interface? (Give your answer to two decimal places.)
If the refractive index of the rarer medium increases, what happens to the critical angle?
State the formula for the critical angle in terms of the refractive indices of two media.
The refractive index of water is 1.33. What is the critical angle for the water-air interface? (Give your answer to two decimal places.)
What is total internal reflection?
