MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 Ordinary light has components of vibration in One direction Different direction All directions None of these
2 If the plane polarized light is incident on the second sheet of Polaroid, no light is emitted when their axes are Parallel to each other Perpendicular to each other In between two positions None of these
3 If plane polarized light is incident on the second sheet of Polaroid, the light emitted is full light when their axes are Parallel to each other Perpendicular to each other In between two positions None of these
4 What will be the colour of the sky as seen from the earth if there were no atmosphere ? Black Blue Orange Red
5 Which one of the following waves cannot be polarized Radio waves X-rays Transverse waves in a string Longitudinal waves in a gas
6 When a ray of light goes from a denser medium into a rare medium The wavelength of light is decreased The frequency of light increased The speed of light is increased The light undergoes a phase change of π
7 How is the interference pattern in Young's double slit experiment affected if the sodium light is replaced by red light of the same intensity The fringes will vanish The fringes will become brighter The fringes will increase The fringes will decrease
8 Which one of the following phenomenon cannot be explained by the wave theory of light ? Reflection Refraction Photoelectric effect Diffraction
9 Which phenomenon of light conclusively prove that light waves are transverse waves Reflection Diffraction Interference Polarization
10 The concentration in solution can be determined by the property known as Solubility Insolubility Optical activity None of these
11 The organic substances which shows optical rotation when they are in solution Tartaric acid Sugar Alcohol a and b
12 The plane of polarization is rotated many degrees when a thickness of such crystal is One millimeter Less than one millimeter A few millimeter None of these
13 The typical example/examples of optically active crystals Quartz Crystals of sodium chlorate Crystals of sodium chloride a and b
14 When a plane polarized light is passed through certain crystals they Are totally absorbed Are totally reflected Rotate the plane of polarization None of these
15 Sunlight is also partially polarized because of Earth's atmosphere due to scattering by Water vapours Air particles Dust particles All of these
16 The reflected light is Unpolarized Polarized Partially polarized None of these
17 Glare produces when light reflects from water snow and rough road surfaces when their angle of incidence is Small Large Very large None of these
18 The phenomenon of polarization proves that the light waves are Transverse wave Longitudinal waves Stationary waves None of these
19 Commercial polarizing material is Colour glass Infra red glass Polaroid glass None of these
20 The dichronic substances are used in the process getting plane polarized light Selective absorption Refraction through crystals Reflection from different surfaces None of these
21 All possible process/processes to get plane polarized light Reflection from different surfaces Refraction through crystals Scattering by small particles All of these
22 The polarized can be achieved by using process like Coherent sources Diffraction Selective absorption None of these
23 The unpolarized light is An ordinary incandescent bulb Sun Moon All of these
24 Ordinary light has components of vibrations in all possible planes. Such light is Unpolarized light Polarized light Both None of these
25 The waves produced in a stretched string are called Stationary waves Mechanical waves Transverse mechanical waves None of these
26 X-ray diffraction has been very useful in determining structure of Hemoglobin Double helix structure of DNA Blood speed a and b
27 2 d sin θ = nλ can be used to determine the Inter planar spacing Wavelength Incident angle All of these
28 In Bragg's Equation 2d sin θ = nλ, where 'n' is Order of spectrum Number of reflections Order of reflection None of these
29 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
30 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
31 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
32 The scattering of X-rays from atoms in a crystalline lattice gives rise to Interference Diffraction Reflection None of these
33 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
34 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
35 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
36 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
37 The relation d sinθ = nλ, where 'n' is the Number of bright fringes Number of dark fringes Order of the spectrum None of these
38 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
39 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
40 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
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