ECAT Pre Engineering Physics Chapter 10 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 10 Optical Instruments MCQ`s Test

Sr.#	Question	Answer
1	When the source of light is at very large distance, the shape of wavefront is	A. Spherical B. Cylindrical C. Plane D. None of these
2	A line which represents the direction of travel of a wave is known as	A. Spherical wavefront B. Locus C. Ray D. Either B or C
3	Wavelength of light, on the average, is given by	A. 10^-14m B. 10^-10m C. 10^-6m D. 10^-4m
4	The appearance of colours in the soap (or oil) film results from	A. Dispersion B. Interference C. Reflection D. Refraction
5	Frequency of red colour as compared to that of violet colour is	A. Equal B. Smaller C. Greater D. None of these
6	In an interference pattern of Young's Double Slit (YDS) experiment	A. Bright fringes are wider than dark fringes B. Dark fringes are wider than bright fringes C. Both dark and bright fringes are of equal width D. Central fringes are wider than the outer fringes
7	Huygen principle is used to determine	A. Speed of light B. Location of wavefront C. About polarized and unpolarized light D. None of them
8	Laws of reflection and refraction can also be explained by	A. Particle nature of light B. Quantum nature of light C. Wave nature of light D. Complex nature of light
9	Light waves are	A. Transverse waves B. Longitudinal waves C. Compressional D. None of them wave
10	In YDS experiment, fringe spacing means the distance between two consecutive _________ fringes	A. Bright B. Dark C. Any of A or B D. None of these