ECAT Pre Engineering Physics Chapter 10 online mcq test with answers for chapter 10 (Optical Instruments)

Physics ECAT Pre Engineering Chapter 10 Optical Instruments Online Test

Sr. #	Questions	Answers Choice
1	When the source of light is at very large distance, the shape of wavefront is	Spherical Cylindrical Plane None of these
2	Speed of light in vacuum depends upon	Frequency Wavelength Amplitude None of these
3	In case of point source of light, shape of wavefront is	Spherical Cylindrical Plane None of above
4	Huygen principle is used to determine	Speed of light Location of wavefront About polarized and unpolarized light None of them
5	Angle between ray of light and the corresponding wavefront is	0<sup>0</sup> 60<sup>0</sup> 90<sup>0</sup> 120<sup>0</sup>
6	The locus of all the points in the same phase of vibration is called	Wave pocket Wavefront Wave number None of these
7	Monochromatic light means wave of	Same frequency Same colour Same Wavelength All of them
8	Frequency of red colour as compared to that of violet colour is	Equal Smaller Greater None of these
9	Wavelength of red colour as compared to that of violet colour is	Smaller Longer Equal None of these
10	Which one of the followings can act approximately as a source of monochromatic light	Neon lamp Fluorescent tube Sodium lamp None of these
11	Light waves are	Mechanical waves Electromagnetic waves Any of above None of above
12	Electromagnetic waves transport	Energy only Momentum only Both A and B None is correct
13	Wavelength of light, on the average, is given by	10<sup>-14</sup>m 10<sup>-10</sup>m 10<sup>-6</sup>m 10<sup>-4</sup>m
14	Light waves are	Transverse waves Longitudinal waves Compressional None of them wave
15	Light has	Wave nature Dual nature Particle nature None of them

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