Deck 22: Physics and Waves: Exploring Phenomena, Unification, and Detection

Question 1

Speed at which stars and galaxies are moving away from us is determined by phenomena of

A)blue shift
B)yellow shift
C)red shift
D)orange shift

Answer 1

red shift

Question 2

Electric and magnetic fields vary at angle of

A)30°
B)90°
C)45°
D)180°

Answer 2

90°

Question 3

Unification of electromagnetic and weak nuclear forces was done by

A)Maxwell
B)Faraday
C)Kirchhoff
D)Abdus-Salam

Answer 3

Abdus-Salam

Question 4

Frequency and time period are

A)directly related
B)not related
C)inversely related
D)directly proportional

Question 5

Amount by which one oscillation leads or lags behind another is called

A)in phase
B)intensity
C)phase difference
D)superposition

Question 6

Number of oscillations per unit time is called

A)wavelength
B)amplitude
C)displacement
D)frequency

Question 7

If the particles of medium vibrate at right angles to the direction of velocity then wave is

A)longitudinal
B)transverse
C)abrupt
D)sound

Question 8

Wave speed is directly proportional to

A)frequency
B)amplitude
C)wavelength
D)energy

Question 9

Longitudinal waves gives rise to

A)amplitude
B)frequency
C)wavelength
D)high and low pressure regions

Question 10

Ranges of waves which overlap are

A)x-rays and gamma rays
B)x-rays and infrared rays
C)gamma rays and infrared rays
D)UV rays and infrared rays

Question 11

High speed electrons from particle detectors are used to determine

A)arrangement of atoms in metals
B)diameter of atomic nuclei
C)inter atomic distance
D)circumference of atomic nuclei

Question 12

Waves associated with electrons are referred to as

A)plasma waves
B)UV waves
C)gamma rays
D)matter waves

Question 13

Frequency below which no electrons are emitted from metal surface is

A)minimum frequency
B)angular frequency
C)maximum frequency
D)threshold frequency

Question 14

Loss of energy of an electron results in

A)absorption of photon
B)emission of photon
C)destruction of photon
D)formation of photon

Question 15

Wavelength of a 65 kg person running at a speed of 3 m s^-1 through an opening of width 0.80 m is {{}}

A)34 m
B)35 m
C)3.4 × 10^-36 m
D)3.5 m

Question 16

According to Newton, the light travels as

A)particles
B)waves
C)both A and B
D)dust

Question 17

In electron diffraction, the rings behave as

A)particles
B)waves
C)both A and B
D)rays

Question 18

Energy absorbed by electron is used in

A)escaping the metal
B)increasing kinetic energy
C)both A and B
D)increasing frequency

Question 19

Diffraction of slow moving electrons is used to estimate

A)arrangement of atoms in metals
B)nature of atoms
C)number of atoms in metals
D)position of atoms in metalloids

Question 20

Energy of photon is directly related to the

A)wavelength
B)wave number
C)frequency
D)amplitude