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 10
Define the critical angle in the context of total internal reflection.
Describe one medical application of total internal reflection.
Describe what happens to a light ray at the critical angle.
Describe what happens to a light ray when the angle of incidence is less than the critical angle at a denser to rarer medium boundary.
A light ray in an optical fiber strikes the core-cladding boundary at 60°. If the critical angle is 45°, will total internal reflection occur?
A light ray in water (n=1.33) is incident on the water-air boundary at 60°. Will it undergo total internal reflection?
A light ray is incident at 30° from glass (n=1.5) to air (n=1.0). Will total internal reflection occur?
Explain why mirages are seen in deserts using the concept of total internal reflection.
Which of the following devices uses total internal reflection? (1) Microscope (2) Periscope (3) Optical fiber (4) Magnifying glass
Which of the following is an example of total internal reflection in nature? (1) Rainbow (2) Mirage (3) Sunset (4) Eclipse
Which of the following is necessary for total internal reflection to occur? (1) The second medium must be denser. (2) The angle of incidence must be less than the critical angle. (3) The first medium must have a higher refractive index. (4) The light must be monochromatic.
Which of the following is NOT a condition for total internal reflection? (1) Light must travel from a denser to a rarer medium. (2) The angle of incidence must be less than the critical angle. (3) The angle of incidence must be greater than the critical angle. (4) The refractive index of the first medium must be greater than that of the second.
Fill in the blank: The angle of refraction at the critical angle is ______ degrees.
Fill in the blank: The critical angle for a diamond-air interface is ______ than that for a glass-air interface.
Fill in the blank: The phenomenon of ______ is used in periscopes to change the direction of light by 90 degrees using prisms.
Fill in the blank: The phenomenon of total internal reflection is used in ______ to transmit light signals over long distances.
A light ray in an optical fiber strikes the core-cladding boundary at 60°. If the critical angle is 45°, will total internal reflection occur?
A light ray in water (n=1.33) is incident on the water-air boundary at 60°. Will it undergo total internal reflection?
A light ray is incident at 30° from glass (n=1.5) to air (n=1.0). Will total internal reflection occur?
Light is incident at 50° from water (n=1.33) to air (n=1.00). Will total internal reflection occur?
