ECAT Pre Computer Science Chapter 10 MCQ Test With Answer

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

Sr.#	Question	Answer
1	The speed of the secondary wavelets as mentioned in Huygen's principle is ________ the speed of propagation of the wave itself	A. Equal to B. Greater than C. Smaller than D. None of these
2	Frequency of red colour as compared to that of violet colour is	A. Equal B. Smaller C. Greater D. None of these
3	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
4	Light has	A. Wave nature B. Dual nature C. Particle nature D. None of them
5	Wavelength of light, on the average, is given by	A. 10^-14m B. 10^-10m C. 10^-6m D. 10^-4m
6	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
7	The terms phase difference and path difference are	A. Same B. Different C. Equal D. none of these
8	In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves.	A. Greater than B. Smaller than C. Equal to D. None of these
9	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
10	Angle between ray of light and the corresponding wavefront is	A. 0⁰ B. 60⁰ C. 90⁰ D. 120⁰