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Physics > Particle and Waves > Flashcards

Particle and Waves Flashcards

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1
Q

What is an antineutrino?

A

The antiparticle of the neutrino

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2
Q

What is a photoelectron?

A

An electron emitted from an atom due to an interaction with a photon

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3
Q

What is a positron?

A

The antiparticle of the electron

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4
Q

Stationary wave

A

Wave that has no resultant energy transfer and remains in the same position

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5
Q

Define the weak interaction

A

Interaction between 2 leptons, and between leptons and hadrons.

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6
Q

What is the weak nuclear force

A

A fundamental force of nature that causes beta decay.

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7
Q

Define accuracy

A

Term used to describe how close a single measured value is to the true value.

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8
Q

Define frequency

A

Number of oscillations per unit time.

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9
Q

What is a quark

A

Elementary particle that makes up hadrons.

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10
Q

Define ionisation

A

Process that causes an atom to lose or gain electrons

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11
Q

What is an alpha particle?

A

A helium nucleus ( 2 protons 2 neutrons).

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12
Q

Define wavelength

A

smallest distance between two equal consecutive points on a wave oscillating in phase.

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13
Q

What is a tau?

A

A subatomic particle part of the lepton family.

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14
Q

What is an isotope?

A

Two or more forms of the same element that hold the same number of protons but have a different number of neutrons.

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15
Q

What is gravitational force?

A

Force of attraction between 2 masses.

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16
Q

What is excitation?

A

When an atom or molecule gaining a discrete amount of energy from electromagnetic radiation.

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17
Q

What is a baryon?

A

A composite particle comprising 3 quarks.

18
Q

What is a hadron?

A

Particle or antiparticle affected by strong nuclear force, and by electromagnetic force if charged.

19
Q

What is a kaon?

A

Particle that has potential to decay into a pion.

20
Q

What is a strange quark?

A

A flavour of quark which has same charge as down quark but more mass.

21
Q

Absolute uncertainty

A

range of values within which the true value of the measurement is expected to fall.

22
Q

Stopping potential

A

Voltage required to reduce the photoelectric current to zero.

23
Q

Define precision

A

Describes proximity of an experiments repeated measurements.

24
Q

Threshold frequency

A

Lowest frequency of light required to ensure photoelectric emission.

25
Q

Define strangeness

A

Number given to every particle and antiparticle, which is conserved in the strong interaction but not with decays of strange quarks and antiquarks or in the weak interaction

26
Q

Stationary wave

A

Wave with no resultant energy transfer and remains in same position.

27
Q

What is electron volt?

A

Unit of energy equal to the work done in moving an electron through a potential difference of 1V

28
Q

Work function

A

Property of a metal that defines the lowest energy required to remove an electron from its surface.

29
Q

Antinode

A

Point on stationary wave with maximum possible displacement

30
Q

Microwave

A

Electromagnetic wave with wavelength between 10-1m and 10-3m

31
Q

Rest mass

A

Mass of object when stationary

32
Q

What is antiparticle?

A

Subatomic particle that has same rest mass as its corresponding particle but equal and opposite charge.

33
Q

Strong nuclear interaction

A

Interaction between 2 hadrons.

34
Q

Longitudinal wave

A

Wave where displacement of medium is in the same direction as wave propagation.

35
Q

What is a Photon

A

Quantum of electromagnetic energy

36
Q

What is a Lepton

A

Elementary particle or antiparticle not affected by strong nuclear force

37
Q

What is a Muon

A

Subatomic particle, part of lepton family.

38
Q

Antineutron

A

Antiparticle of neutron

39
Q

Momentum

A

Property of a moving object equal to m x v

40
Q

Photoelectric effect

A

Term used to describe phenomenon of some metals emitting electrons when light is incident on their surface

Physics (6 decks)

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