diffraction occurs when light passes a) by a small particle b) through a small h

Question

diffraction occurs when light passes

a) by a small particle

b) through a small hole

c) through a double slit

d) by a sharp edge

e) all the above

2) Green light of wavelength 500 nm is incident normally on a diffracting grating that has 5300 lines/ cm the second-order image is diffracted at an angle from the normal of

a) 10 degree

b)48 degree

c) 16 degree

d)57 degree

e) 32 degree

3) red light (wavelength=700 nm) is incident normally on a diffraction grating having 1000 lines/cm. a maximum is observed at a deflection angle of12 degrees. the order in which this occurs is

a) 1

b)2

c)3

d)4

e) 5

4) the pattern of light and dark fringes formed in young's double-slit experiment is due to

a)interference and dispersion

b) refraction and dispersion

c) interference and diffraction

d)diffraction and refraction

e) refraction and interference

Explanation / Answer

1 ) e)all the above

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2)e)32 degree

d sin theta = m lambda

sin theta = 5 * 10-7 / 1.9 * 10-6

theta = 32 degree

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3)c) 3

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d)c) interference and diffraction

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