MCAT Physics Chpter-9, MCAT Physics Chpter-9

MCAT Physics chapter wise notes, ECAT PHYSICS Notes chapter wise, free notes for entry test, free MCAT MCQS PHYSICS, free notes download for entry test preparation, Physics intermediate notes chapter wise free download

Physics Notes for MCAT, Physics notes for ECAT.

1.	For which of the following colours will the fring width will be smaller in young double slit experiment
	a)	Violet	b)	Red	c)	Green	d)	Yellow
2.	A diffraction grating has 500 lines per mm its slit spacing will be
	a)	5×103mm	b)	5×10-3mm	c)	2×103mm	d)	None of these
3.	Two waves originating from sources S1 and S2 have zero phase difference common wavelength λ will show completely destructive interference at a point P if path difference
	a)	5λ	b)	¾ λ	c)	5/4 λ	d)	11/2 λ
4.	An object is placed between two parallel mirrors. The number of images is
	a)	2	b)	4	c)	8	d)	infinite
5.	A point source placed in a homogeneous medium gives rise to….wavefront
	a)	Spherical	b)	Cylindrical	c)	Plane	d)	None of these
6.	Rain bow is due to
	a)	Interference	b)	Diffraction	c)	Dispersion	d)	Reflection
7.	The blue sky is due to
	a)	Diffraction	b)	Scattering	c)	Reflection	d)	Polarization
8.	When one mirror of Michelson interferometer is moved a distance of 0.5 nm,2000 fringes are observed, the wavelength of light used is
	a)	5000 nm	b)	1000A°	c)	1A°	d)	100A°
9.	The wavelength of X-rays is of the order of
	a)	10A°	b)	1000A°	c)	1A°	d)	100A°
10.	If Michelson interferometer by moving the mirrir through a distance of λ/4,the path difference changes by
	a)	λ	b)	λ/2	c)	λ/4	d)	zero
11.	In Newton’s ring the central part appears dark due to
	a)	Phase change	b)	Destructive interference	c)	Both a and b	d)	None of these
12.	In Young’s experiment fringe width is ω if distance between slits is doubled and distance of screen from slit is halved new fringe width will be
	a)	ω	b)	4ω	c)	ω/4	d)	ω/2
13.	Which of the following property of light does not with the nature of  medium
	a)	Velocity	b)	wavelength	c)	Amplitude	d)	Frequency
14.	A ray of light travelling from rare to denser medium sufferes a phase change of
	a)	60°	b)	90°	c)	180°	d)	None of these

15.	The shadow of satellite donot seen on earth due to property of light
	a)	Reflection	b)	rarefaction	c)	Diffraction		d)	none
16.	Which property show that wavelength of light is smaller than that of sound
	a)	Diffraction	b)	Polarization	c)	Interference		d)	reflection
17.	Crystals of a material can behave as
	a)	Convex lens	b)	Interferometer	c)	Diffraction grating		d)	concave
18.	Which field is absorbed in polarization of light
	a)	Electric field	b)	Magnetic field	c)	both		d)	none
19.	In a Polaroid light beams can pass ………to the layers of crystal
	a)	Parallel	b)	Perpendicular	c)	Both possible		d)	none
20.	A ray of light is always to wavefront
	a)	Parallel	b)	Perpendicular	c)	d)	All of these
21.	The basic principle in Michelson experiment is
	a)	Diffraction	b)	Dispersion	c)	Reflection		d)	Interference
22.	In young’s double slit experiment phenomenon involved
	a)	Interference	b)	Diffraction	c)	both		d)	none
23.	Polarization can be achieved by
	a)	Absorption	b)	Scattering	c)	Reflection		d)	all
24.	Sodium light λ=589 nm is incident normally on grating having 3000 lines per cm.the highest order of spectrum obtained with this grating
	a)	5th	b)	12 th	c)	6 th		d)	8 th
25.	The points on a wavefront and points on next wavefront will be said as
	a)	Coherent	b)	Non coherent	c)	Both possible		d)	None of these
26.	When you place your fingers infront of  light bulb different colours are due to
	a)	Diffractin	b)	Interference	c)	Reflection		d)	None
27.	Diffraction fringes become narrow if distance from diffracting object
	a)	Increases			b)	Decreases
	c)	Both			d)	none
28.	The path difference for Newton’s bright rings
	a)	nλ	b)	(n+1/2)λ	c)	Nλ/2		d)	All are true
29.	If you want to get more  order of diffraction then grating element should be
	a)	Small	b)	Large	c)	No effect by grating element		d)	none
30.	If one the slit is in young’s experiment is covered by blue cover and other with red,then interference fringes will be of the colour
	a)	Blue	b)	Red	c)	Mixture of both		d)	No fringes appear