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	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
2	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
3	To observe interference of light, the condition, which must be met with is that the sources must be	A. Monochromatic B. Phase coherent C. Both of above D. None of above
4	The property of light which does not change with the nature of the medium is	A. Frequency B. Amplitude C. Wavelength D. None of these
5	Angle between ray of light and the corresponding wavefront is	A. 0⁰ B. 60⁰ C. 90⁰ D. 120⁰
6	In case of constructive interference of two waves, the amplitude of the resultant wave is __________ either of the waves	A. Greater than B. Equal to C. Smaller than D. None of these
7	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
8	The wave nature of light was proposed by	A. Newton B. Thomas Young C. Huygen D. None of these
9	Monochromatic light means wave of	A. Same frequency B. Same colour C. Same Wavelength D. All of them
10	Wavelength of red colour as compared to that of violet colour is	A. Smaller B. Longer C. Equal D. None of these