Transmission of Light
Physics ⇒ Light and Optics
Transmission of Light starts at 8 and continues till grade 12.
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See sample questions for grade 12
A beam of white light passes through a prism and splits into different colors. What is this phenomenon called?
A glass slab has parallel faces. If a light ray enters the slab at an angle, what happens to the emergent ray?
A light ray strikes a mirror at an angle of 60° to the surface. What is the angle of reflection?
A material has a refractive index of 2.0. What is the speed of light in this material? (Take c = 3.0 × 10⁸ m/s)
A ray of light passes from air into a medium and bends towards the normal. What can you infer about the refractive index of the medium compared to air?
A student shines a laser beam into water at an angle of 45°. If the refractive index of water is 1.33, what is the angle of refraction? (Use n₁=1 for air)
Describe the process of light transmission through a fiber optic cable.
Describe what happens to the intensity of light as it passes through a series of identical transparent sheets.
Explain why a pencil appears bent when placed in a glass of water.
Explain why objects appear less distinct when viewed through frosted glass.
Explain why stars twinkle when observed from Earth.
Explain why sunglasses are often polarized.
If the angle of incidence is 30° and the angle of refraction is 20°, what is the refractive index of the second medium? (Use n₁=1 for air)
Light travels from glass (n=1.5) into air (n=1.0). Calculate the critical angle for total internal reflection.
State the law of reflection.
The refractive index of a material for red light is 1.50 and for blue light is 1.52. Which color travels faster in the material?
The speed of light in a medium is given by v = c/n. If n = 1.5, what is the speed of light in the medium? (Take c = 3.0 × 10⁸ m/s)
What is the main difference between transparent, translucent, and opaque materials in terms of light transmission?
