Powerpoint 1- From Modern Physics To Radiation Physics

Question 1

Event

Answer 1

A physical happening that occurs at a certain place at a certain time

Question 2

Reference frame

Answer 2

Used to record the event. It consists of a coordinate system and a clock Eg (t,x,y,z)

Question 3

Inertial reference frame

Answer 3

A frame in which newtons law of inertial is valid Non accelerating frames of reference Accelerating frames are NOT inertial frames

Question 4

Two postulates

Answer 4

1) The laws of physics are the same in every inertial reference frame 2) the speed of light in a vacuum, measured in any inertial frame, always has the same value of c. It is independent of the source or observer

Question 5

Space time

Answer 5

Space and time

Question 6

Time dilation

Answer 6

The time difference between two events that occur at the same place in one frame is less that the time interval between the same events that is measured in another frame in which events occur at different places

Question 7

Phenomena of special relativity

Answer 7

Time dilation Length contraction Relative velocity Mass-energy

Question 8

Proper time

Answer 8

The time difference between events that happen at the same place in a reference frame

Question 9

Length contraction

Answer 9

Objects length is larger when measured by an observer at rest with respect to it. If object is moving with respect to initial observer, that observer measures a smaller length

Question 10

When to use relativistic energy

Answer 10

If the speed of the object is below 10% of speed of light or kinetic energy less than 0.5% of an object rest energy, non-relativistic expressions are accepted (error is small

Question 11

γ

Answer 11

Question 12

β

Answer 12

Question 13

Relativistic mass

Answer 13

Question 14

Relativistic momentum

Answer 14

Question 15

Thermal radiation

Answer 15

Radiation emitted by hot objects In infrared region Intensity depends on wavelength

Question 16

Blackbody

Answer 16

At a constant temperature, a perfect black body is an object that absorbed all the electromagnetic radiation that falls on it. Absorbs and re-emits radiation in continuous spectrum Temperature dependent

Question 17

Relativistic Energy (E)

Answer 17

Question 18

Mass Energy Equivalence

Answer 18

Question 19

Relation between E and p

Answer 19

Question 20

Relative Velocity

Answer 20

Question 21

Doppler Effect

Answer 21

Question 22

Transverse Doppler Effect

Answer 22

Question 23

Photoelectric Effect

Answer 23

Question 24

Compton Effect

Answer 24

Question 25

De Broglie Hypothesis for photon

Answer 25

Question 26

De Broglie Hypothesis for material particles

Answer 26

Question 27

Schrodinger Wave Equation (SWE)

Answer 27

Question 28

Probability of finding a particle in a region dx at x is

Answer 28

Question 29

Normalization Condition of SWE

Answer 29

Question 30

Solution to SWE

Answer 30

Question 31

Expectation value of x

Answer 31

Question 32

Expectation value of f(x)

Answer 32

Question 33

Heisenberg Uncertainty Principle

Answer 33