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's theory cannot explain	A. Diffraction B. Interference C. Polarization D. Photoelectric effect
2	Which one of the following can act approximately as a source of monochromatic light;	A. Neon lamp B. Fluorescent tube C. Sodium lamp D. None of these
3	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
4	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
5	A grating with high resolving power can distinguish _______ difference in wavelengths :	A. Smaller B. Larger C. Zero D. None of these
6	Monochromatic light means waves of:	A. Same frequency B. Same colour C. Same wavelength D. All of them
7	Huygen's principles states that:	A. Light has dual nature B. Either of these C. None of these D. Light travels in straigth line
8	The focal length of convex lens having magnifying power of 5.55 is:	A. 5.5 cm B. 5 cm C. 4.5 cm D. 6 cm
9	How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:	A. The upper half of the image is cut off B. The brightness of the image is reduced C. The brightness of the image is increased D. No effect at all
10	The image of the tip of a needle is never sharp because of	A. Polarization of light B. Interference of light C. Diffraction of light D. Reflection of light