Flashcards on Refraction of light and total internal reflection
Refraction of Light & Total Internal Reflection Explained for Students
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25 cards
Card 1
Question: What is refraction?
Answer: Refraction is the phenomenon where light changes direction when transmitted from one medium to another.
Card 2
Question: What is the refractive index?
Answer: The refractive index (n) is a dimensionless quantity that describes how fast light travels through a material, defined as the ratio of the speed of li
Card 3
Question: What is the formula for refractive index?
Answer: n = c / v, where n is the refractive index, c is the speed of light in a vacuum, and v is the speed of light in the medium.
Card 4
Question: What does a higher refractive index indicate?
Answer: A higher refractive index indicates that light travels slower in that medium and will bend more significantly when entering or leaving it.
Card 5
Question: What is Snell's Law?
Answer: Snell's Law describes the relationship between the angles of incidence and refraction, and the refractive indices of two media: n₁ · sin α₁ = n₂ · sin
Card 6
Question: What is the normal in the context of refraction?
Answer: The normal is an imaginary line perpendicular to the surface at the point where the light ray strikes it.
Card 7
Question: What is the angle of incidence?
Answer: The angle of incidence (α₁) is the angle between the incident light ray and the normal.
Card 8
Question: What is the angle of refraction?
Answer: The angle of refraction (α₂) is the angle between the refracted light ray and the normal.
Card 9
Question: When does light bend towards the normal?
Answer: Light bends towards the normal when passing from an optically less dense medium (lower n₁) to an optically denser medium (higher n₂), meaning n₁ < n₂.
Card 10
Question: When does light bend away from the normal?
Answer: Light bends away from the normal when passing from an optically denser medium (higher n₁) to an optically less dense medium (lower n₂), meaning n₁ > n