Refraction of Light
ICSE · Class 10 · Physics
Flashcards for Refraction of Light — ICSE Class 10 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
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Explore the full setWhat is refraction of light? Define the phenomenon clearly.
Answer
Refraction is the phenomenon in which light changes its direction and speed when it travels obliquely from one transparent medium to another. The change in direction occurs only for oblique incidence,…
State the two laws of refraction of light.
Answer
1. The incident ray, refracted ray, and normal at the point of incidence all lie in the same plane. 2. The ratio of sine of angle of incidence to sine of angle of refraction is constant for a given pa…
Define refractive index. What are its units?
Answer
Refractive index is the ratio of sine of angle of incidence to sine of angle of refraction (sin i / sin r). It can also be defined as the ratio of speed of light in vacuum to speed of light in the med…
What happens to light when it travels from a rarer medium to a denser medium?
Answer
When light travels from a rarer medium to a denser medium: 1. It bends towards the normal 2. Speed decreases 3. Wavelength decreases 4. Frequency remains unchanged 5. Angle of refraction < Angle of in…
List the factors affecting the refractive index of a medium.
Answer
1. Density of the medium - Higher density leads to higher refractive index 2. Temperature - Higher temperature leads to lower refractive index 3. Wavelength of light - Shorter wavelength (violet) has …
What is the principle of reversibility of light? Give an example.
Answer
The principle states that if light travels from medium 1 to medium 2 following a particular path, then light traveling in the reverse direction will retrace the same path. Example: If ₐn_g = 3/2, then…
What is lateral displacement? On what factors does it depend?
Answer
Lateral displacement is the perpendicular distance between the incident ray and the emergent ray when light passes through a parallel-sided glass block. It depends on: 1. Thickness of the glass block …
Why do we see multiple images in a thick mirror or glass slab?
Answer
Multiple images are formed due to successive partial reflections and refractions at the two surfaces of the thick mirror. The second image is brightest because about 96% of light undergoes refraction …
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