Basic Quantum Mechanics Relativity - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	According to classical mechanics space, time, Mass are all?	Absolute and variant
2.	In classical mechanics mass does not depend on?	Velocity
3.	Accelerated frames are called?	Non-inerial frame
4.	The inverse transformation are?	Y=Y, Z=Z and X=X+Vt
5.	For the values of V<<C Lorentz transformations reduces to?	Galilean transformation
6.	When the observer is in moving condition the sphere is look like?	Ellipsoid
7.	A rod 1m long is moving along its length with a velocity 0.6C. Calculate its length?	0.8m
8.	The brother who returns back to the earth after a space journey finds himself younger than his twin brother ho stayed behind on the earth is called?	Twin paradox
9.	If a vertical rod is carried by an observer in motion it will appear for observer at rest is?	Vertical
10.	Eigen values of Hermitian operator are?	Real
11.	The increase of mass with velocity has been tested in?	Particle accelerators
12.	Moving clock measure shorter time interval, stationary clock measures long time interval. This is called?	Time dilation
13.	The postulates of special theory of relativity are?	The laws of physics are same and the velocity of light is same in all inertial frame
14.	Accelerated frames are called?	Non-inertial frame
15.	If V <<<< C	Lorentz transformation reduced to Galilean transformation
16.	The length contraction becomes appreciable only when?	V=C
17.	Law of addition of velocity applies only?	Velocities are in the same direction
18.	The magic numbers are?	2, 8, 20, 28, 50, 82
19.	Mass equivalence of 1 amu is equal, to?	931 Mev
20	The ratio of the mass of a particle to its rest mass when its velocity is 0.8C?	1.66
21	Spectrum of black body could be explained by?	Classical methods
22	The pair of variables in an un certainity relations ?	Energy and time
23	The eigen functions of a Hermitian operator belonging to different eigen values are?	Orthogonal
24	Stationary clock measures?	Shorter time interval
25	The produce electron – positron pair the minimum energy of photon must?	1.02 MeV