ENTRANCE TEST – 2011 | Multiple Questions and Answers

6.	For interference of light waves to take place, the required condition is

	A.	The path difference of the light waves from the two sources must be large
	B.	The interfering waves must be non-coherent
	C.	The light waves may come from different sources
	D.	The light waves must come from two coherent sources

7.	The property of bending of light around an obstacle and spreading of light waves into geometric shadow of an obstacle is called:

	A.	Diffraction of Light
	B.	Polarization of Light
	C.	Quantization of Light
	D.	Interference of Light

8.	The normal human eye can focus a sharp image of an object on the eye if the object is located at certain distance called

	A.	Least Point
	B.	Near Point
	C.	Far Point
	D.	Distinct Point

9.	A source of sound wave emits waves of frequency ‘f’. If ‘v’ is speed of sound waves, then what will be the wavelength of the waves

	A.	v /f
	B.	vf
	C.	v - uo/ f
	D.	(v − uo)f