ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

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

Sr.#	Question	Answer
1	The appearance of the colour in the soap (oil) film results from:	A. Dispersion B. Interference C. Reflection D. Refraction
2	The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called	A. Diffraction B. Interference C. Polarization D. Dispersion
3	When a source of light isat very large distance,the shape of wavefront is:	A. Spherical B. Cylindrical C. Plane D. None of these
4	The ratio of the size of the image to that of object is called:	A. Focal length B. Aperture C. Linear magnification D. Principal axis
5	With age, least distance of distinct vision:	A. Increases B. Decreases C. Is not affected D. None is correct
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	Angle between the ray of light and the corresponding wavefront is:	A. 0° B. 60° C. 90° D. 120°
8	Wave length of that color as compared to that of violet color is:	A. Smaller B. Longer C. Equal D. None of these
9	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
10	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