MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 On a diffraction grating a large number of close parallel equidistant slits are ruled on it By hand electronically mechanically none of them
2 Diffraction is concerned with the superposition of very large number of secondary wavelets a few secondary wavelets two secondary wavelets no secondary
3 The diffraction is found to be prominent when the wavelength of light is small as compared with the size of obstacle large as compared with the size of obstacle equal as compared with the size of obstacle Very small as compared with the size of the obstacle
4 The property of bending of light around obstacies is called interference reflection diffraction polarization
5 The length of the standard metre measured by Michelsion's interferometer comes out to be 1,553, 163.5 wavelength 1553.5 wavelength 155316.5 wavelength none of them
6 If the wavelength of light used in Michelsion's interferometer is 400 nm and the moveable mirror only moved throughλ/4, then the length moved will be 10 nm 10<sup>-2</sup>mm 1 nm 10<sup>-4</sup>mm
7 Wavelength of X-rays falling at a glancing angle of 30° on a crystal with atomic spacing 2 x 10-10m for first order diffraction is 4 x 10<sup>-10</sup>m 2 x 10<sup>-10</sup>m 0.2 x 10<sup>-10</sup>m 20 x 10<sup>-10</sup>m
8 In Michelsion's interoferometer, if the moveable mirror is moved through a distance 0.05 mm and 500 finges are observed, then the wavelength of light used is 1 x 10<sup>-7</sup>m 2 x 10<sup>-7</sup>m 1.5 x 10<sup>-7</sup>m 1 x 10<sup>-8</sup>m
9 In Michelsion's interferometer, if 'm' number of fringes are passed in front of a reference point when the moveable mirror is moved a distance L, then L = m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span> L = 2m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span> L = m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/2</span> L = 3/2 m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span>
10 In Michelsion's interferometer, if a dark fringe is seen in the beginning, the next dark fringe will appear by moving the moveable mirror through a distance <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/2</span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/4</span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span> 2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span>
11 Successive dark and bright fringes are formed each time the moveable mirror in Michelsion's interferometer is moved a distance <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/2</span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/4</span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span> 3/2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span>
12 If the moveable mirror in Michelsion's interferometer moves a distanceλ/2, the path difference changes by <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/4</span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ/2</span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span> 3/2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; text-align: center; background-color: rgb(255, 255, 248);">λ</span>
13 In Michelsion's interferometer the path difference is varied by moving compensatory plate moveable mirror fixed mirror telescope
14 Michelesion's interferometer is an instrument usually used to measure intensity of light speed of light wavelength of light dispersion of light
15 The idea of Michelsion's interferometer is based on the reflection of light interference of light refraction of light all of them
16 Michelsion devised the Michelson's interferometer in 1981 1891 1851 1881
17 Michelson's interferometer is an instrument that is capable of measuring distance with low precision high precision extremely high precision extremely low precision
18 At the point of contact of the lens and the glass plate, the incident and reflected rays interfere constructively destructively either of them none of them
19 Newton's rings are formed as a result of diffraction of light dispersion of light interference of light polarization of light
20 At the point of contact of the lens and the glass plate, the Newton's ring is dark bright either of them neither of them
21 In the Newton's ring, as we proceed towards the periphery of the lens, the thickness of air film gradually decreases gradually increases suddenly becomes zero all of them
22 In Newton's rings the thickness of air film at the point of contact is maximum minimum equal to wavelength zero
23 In the thin film, the path difference between the two reflecting waves depends upon thickness of film nature of film angle of incidence all of them
24 When monochromatic light is incident, making certain angle, on a thin parallel film, the interference fringes formed are straight circular square plane
25 When sunlight falls on a soap bubble (film), it appears coloured because of interference of light dispersion of light polarization of light diffraction of light
26 A thin film is a transparent medium whose thickness is comparable with the wavelength of light sound any one of them none of them
27 The bright fringes are termed as minimum maximum bright spots dark spots
28 Layer of oil on water in sunlight appears coloured due to diffraction of light dispersion interference of light polarization of light
29 In Young's double slit experiment, the widths of dark and bright fringes are different equal zero variable
30 The interference fringes are of equal width variable width zero width non-uniform width
31 In Young's double slit experiment, the fringe width depends on wavelength of the light used distance between the slits and screen distance between the slits all of them
32 The fringes produced in Young's double slit experiment will be wider if the distance between the two slits is small large zero very large
33 In Young's double slit experiment fringe width (or fringe spacing) depends inversely on wavelength directly on wavelength directly on square of wavelength inversely on square of wavelength
34 The distance between the centres of two consecutive bright fringes (or dark fringes) is called wavelength fringe width amplitude path difference
35 When one mirror of Michelson interferometer is moved a distance of 0.5 mm. 2000 fringes are observed, the wavelength of light used is 5000 nm 5000 A<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 500 cm 2000 A<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
36 When crest of one wave coincides with the trough of the other wave, it give rise to dispersion constructive interference destructive interference polarization
37 At points where the crest (or trough) of one wave coincides with the crest (or trough) of the other wave, the wave produces destructive interference constructive interference diffraction dispersion
38 Which phenomenon of light takes place in Young's double-slit experiment? polarization of light diffraction of light interference of light reflection of light
39 Which of the following theories of light are explained by the Young's double slit experiment? wave theory of light particle nature of light dual nature of light corpuscular nature of light
40 Two light sources obtained from single source are called non-coherent sources coherent sources monochromatic sources spherical sources
Download This Set

Is this page helpful?