MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 2 d sin θ = nλ can be used to determine the Inter planar spacing Wavelength Incident angle All of these
2 In Bragg's Equation 2d sin θ = nλ, where 'n' is Order of spectrum Number of reflections Order of reflection None of these
3 In Bragg's formula, the path difference should beam integral multiple of the wavelengths d sin θ = nλ d sin 2θ = nλ 2 d sin θ = nλ None of these
4 According to WH Bragg and WL Bragg monochromatic beam of X-rays was reflected form a crystal plane is like a Smooth and regular Mirror Thin film None of these
5 The study of atomic structure of crystals by X-rays was initiated by W.H.. Bragg and W.L. Bragg in 1920 1926 1910 1914
6 The scattering of X-rays from atoms in a crystalline lattice gives rise to Interference Diffraction Reflection None of these
7 The regular array of atoms in a crystal forms a natural diffraction grating of spacing typically ≈ 10<sup>-10</sup> m ≈ 10<sup>-12</sup> m ≈ 10<sup>-8</sup> m ≈ 10<sup>-9</sup> m
8 X-rays is a type of electron magnetic radiations of much shorter wavelengths of the order of 10<sup>-8</sup> m 10<sup>-9</sup> m 10<sup>-10</sup> m 10<sup>-12</sup> m
9 The fine rulings on a compact disc as a diffraction grating but each line is wide like 0.01&nbsp;μm 0.5&nbsp;μm 0.05&nbsp;μm 0.6&nbsp;μm
10 In the relations d sinθ = nλ, shows that the value of θ depends upon 'n' so the images of different colours are much separated in Low orders Middle orders High order None of these
11 The relation d sinθ = nλ, where 'n' is the Number of bright fringes Number of dark fringes Order of the spectrum None of these
12 Zero order image formed by the grating when the angle the along the direction of normal to grating is Zero 90<sup>o</sup> 180<sup>o</sup> None of these
13 When θ = 0 in relation d sinθ = λ, the path difference between the rays coming out from the slits of the grating will be zero. So the image in this directions is Dark Bright Non image formed None of these
14 If the incident light contains different wavelengths the images of each wavelength for a certain value is diffracted in the Same directions Different direction Opposite direction None of these
15 The diffraction grating is used to determine Intensity of light Wavelength of light Refractive index of prism None of these
16 The distance between the two adjacent slits is called Thickness of the slit Distance between and two slits Grating element None of these
17 In diffraction grating has feature/features like A glass plate A large numbers of lines are ruled Spacing between two lines acts as a slit All of these
18 A typical diffraction grating has lines per centimeter is about 500 to 6000 400 to 5000 450 to 5500 425 to 5670
19 The diffraction of light occurs, due to interference, of Obstructed portion Unobstructed portion Both obstructed and unobstructed light None of these
20 The property of bending of light around the obstacle is known is Interference Polarization Diffraction None of these
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