Science Practice Quiz 84

Q1.According to Snell's Law of refraction, what is the relationship between the sine of the angle of incidence (i) and the sine of the angle of refraction (r) for a given colour of light and pair of media?

A. The ratio of sin i to sin r is a constant. B. The sum of sin i and sin r is a constant. C. The product of sin i and sin r is a constant. D. The difference between sin i and sin r is a constant.

Q2.The second law of refraction of light is also commonly known by which other name?

A. Newton's Law of Refraction B. Snell's Law of Refraction C. Huygens' Principle D. Fresnel's Law

Q3.What does the constant value (sin i / sin r) represent in Snell's Law?

A. The speed of light in vacuum. B. The refractive index of the second medium with respect to the first. C. The critical angle of the media. D. The wavelength of light.

Q4.The extent of the change in direction that takes place when a ray of light travels obliquely from one transparent medium into another is expressed in terms of which physical quantity?

A. Wavelength B. Frequency C. Refractive index D. Amplitude

Q5.The refractive index can be linked to which important physical quantity?

A. The relative density of the media. B. The absolute temperature of the media. C. The relative speed of propagation of light in different media. D. The electrical conductivity of the media.

Q6.In which of the following media does light travel fastest, according to the provided text?

A. Water B. Glass C. Air D. Vacuum

Q7.What is the speed of light in vacuum?

A. 3 × 10^5 m s–1 B. 3 × 10^8 m s–1 C. 2 × 10^8 m s–1 D. 1.5 × 10^8 m s–1

Q8.How does the speed of light in air compare to its speed in vacuum?

A. It is considerably faster in air. B. It is exactly the same in air. C. It is only marginally less in air. D. It is considerably slower in air.

Q9.If v1 is the speed of light in medium 1 and v2 is the speed of light in medium 2, what is the formula for the refractive index of medium 2 with respect to medium 1 (n21)?

A. n21 = v2 / v1 B. n21 = v1 / v2 C. n21 = v1 × v2 D. n21 = v1 + v2

Q10.If n12 represents the refractive index of medium 1 with respect to medium 2, and v1 and v2 are the speeds of light in medium 1 and medium 2 respectively, which of the following equations is correct?

A. n12 = v1 / v2 B. n12 = v2 / v1 C. n12 = v1 + v2 D. n12 = v1 × v2

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Science Practice Quiz 84