ECAT Pre Computer Science Chapter 9 MCQ Test With Answer

Top Scorers Of ECAT Physics Chapter 9 Physical Optics MCQ`s Test

Sr.#	Question	Answer
1	Huygen principle is used to determine:	A. Speed of light B. Location of wavefront C. About polarized or unpolarized light D. None of them
2	The contrast in the fringes in an interference pattern depends upon	A. Fringe width B. Relative difference intensities of the two sources C. Distance between the slits D. Wavelength
3	The velocity of light in vacuum can be changed by changing	A. Frequency B. Amplitude C. Wavelength D. None of these
4	A grating with high resolving power can distinguish _______ difference in wavelengths :	A. Smaller B. Larger C. Zero D. None of these
5	In case of point, source of light shape of wavefront is:	A. Spherical B. Cylindrical C. Plane D. None of these
6	Light appears to travel in straight line because	A. It is not absorbed by the atmosphere B. It is refracted by the atmosphere C. Its wavelength is very small D. Its velocity is very large
7	A grating with high resolving power can distinguish _______ difference in wavelengths :	A. Larger B. Zero C. None of these D. Smaller
8	For the virtual image, option _______ is not correct:	A. 1/p = 1/f -1/q B. 1/f = 1/p -1/q C. 1/p=1/p-1/f D. 1/p=1/f+1/q
9	When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:	A. Greater, smaller B. Smaller, smaller C. Smaller, larger D. Greater, larger
10	The least distance of distinct vision is:	A. 10 cm B. 25 cm C. 50 cm D. 100 cm