MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 One angshom is equal to? 10<sup>-8</sup>cm 10<sup>-6</sup>m 10<sup>-10</sup>nm 10<sup>-8</sup>nm
2 Wavelength of X-rays falling at glace angle 30° on crystal with atomic spacing 2 x 10-9m for the first order diffraction is 4 x 10<sup>-6</sup>m 2 x 10<sup>-10</sup>m 0.2 x 10<sup>-10</sup>m 20 x 10<sup>-10</sup>m
3 When a mirror of a Michelsion's interferometor is moved a distance of 0.5 mm, 2000 fringes are observed, the wavelength of the light used is 5000 mm 5000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span> 500 cm 2000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span>
4 For the monochromatic beam of X-rays, the crystal planes in a lattice act like a perfect absorbers boundary mirror none of them
5 The study of atomic structures of crystals by X-rays was started in 1890 1905 1914 1944
6 The regular array of atoms in a crystal has spacing of the order of 10<sup>-16</sup>m 10<sup>-14</sup>m 10<sup>-10</sup>m 10<sup>-6 </sup>m
7 We can observe only when the grating spacing is of the order of the wavelength used greater than the wavelength used less than the wavelength used any one of them
8 The wavelength of X-rays is about 10<sup>-14</sup>m 10<sup>-10</sup>m 10<sup>-6</sup>m 10<sup>-4</sup>m
9 A diffraction grating has 500 liens per mm. its slit spacing or grating element will 500 mm 5 x 10<sup>-3 </sup>mm 2 x 10<sup>-5</sup>mm 2 x 10<sup>-3</sup>mm
10 If 5000 lines per cm are ruled on different on a diffraction grating then the slit spacing will be 5 x 10<sup>-3</sup>A<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 2 x 10<sup>-4</sup>A<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 5 x 10<sup>-5</sup>A<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 2 x 10<sup>4</sup>A<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
11 A diffraction grating contains 5000 lines per centimeter, its grating element will be 1 x 10<sup>-4</sup>nm 1 x 10<sup>-14</sup>m 1 x 10<sup>-14</sup>cm 1 x 10<sup>-4</sup>cm
12 The diffraction grating is used to measure wavelength of light focal length of a lens refractive index of prism polarization of light
13 The spacing between the parallel lines are served as slits source of light opaque lines fringes
14 A glass plate on which a large number of very fine equidistant parallel lines are drawn is called convex lens thin film diffraction grating interferometer
15 The distance between the top adjacent slits on diffraction grating is called element grating element aperture slit
16 A typical diffraction grating has lines per centimeter 10 to 100 100 to 1000 1000 to 5000 400 to 5000
17 On a diffraction grating which thing acts as a slit the lines which are ruled on it the spacing between the lines either of them none of them
18 On a diffraction grating a large number of close parallel equidistant slits are ruled on it By hand electronically mechanically none of them
19 Diffraction is concerned with the superposition of very large number of secondary wavelets a few secondary wavelets two secondary wavelets no secondary
20 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
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