Light :Reflection and Refraction Assignment

1. The dependence of wave speed and index of refraction on wavelength is called

(a) refraction

(b) dispersion

(c) reflection

(d) echo

2. When an oblique ray of light enters from one medium to another then it changes its path. Such a phenomenon is called

(a) reflection

(b) refraction

(c) dispersion

(d) diffusion

3. The band of colours is called

(a) spectrum

(b) prism

(c) medley

(d) LASER

4. Who set forwarded the corpuscular theory of light?

(a) Newton

(b) Huygen

(c) Hertz

(d) Einstein

5. Splitting of complex light into its constituent colours is called

(a) reflection

(b) refraction

(c) dispersion

(d) diffusion

6. Newton's corpuscular theory failure to explain which phenomenon of light?

(a) diffraction

(b) interference

(c) polarization

(d) all of the above

7. In water drops, rainbows are formed by

(a) refraction

(b) reflection

(c) dispersion

(d) all of the above

8. Rebounding of light from a polished surface like a mirror is termed as

(a) reflection

(b) refraction

(c) dispersion

(d) interference

9. Reflection from a rough surface (such as a wall) is called

(a) refraction

(b) dispersion

(c) diffusion

(d) interference

10. Which of the following are defects in human eye?

(a) Myopia (short sightedness)

(b) Hypermetropia (long sightedness)

(c) Presbyopia

(d) all of the above

11. Which law states that when a perfect polarizer is placed in a polarized light beam, the intensity I, of the light passes through is given by 1 = Cos2?

(a) Mauls' law

(b) Hooke's law

(c) Bragg's law

(d) Dalton's law

12. Which law states that the maximum polarization of a light ray may be achieved by letting the ray fall on a surface of a transparent medium such that the refracted ray makes an angle of 90° with the reflected ray?

(a) Mauls' law

(b) Bragg's law

(c) Brewster's law

(d) Lenz's law

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