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Physics > Modern Physics > Flashcards

Modern Physics Flashcards

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1
Q

Quantum

A

Latin for amount, discrete packets “quanta”

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2
Q

Photon

A

A quantum of EM waves; wave-packets of EM waves & energy they carry

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3
Q

Photoelectric effect

A

Light behaves like a stream of photons

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4
Q

Photoelectrons

A

Released electrons in photoelectric effect

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5
Q

Work Function

A

Energy needed to be imparted to an electron on metal surface in order to liberate it

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6
Q

Atomic Spectra

A

The range of f/y of EM waves emitted/absorbed during transitions of electrons between energy levels within an atom

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7
Q

Wave-Particle Duality

A

EM radiation propagates like a wave but exchanges energy like a particle

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8
Q

de Broglie Wavelength

A

Particles in motion can display wave characteristics & behaves as if they had

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9
Q

Nucleon

A

Muscles of atom, composed of protons & neutrons

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10
Q

Atomic number

A

Number of protons in a given nucleus

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11
Q

Mass number

A

Total number of nucleons

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12
Q

Isotope

A

Nuclei that contain same number of protons by different number of neutrons

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13
Q

Strong Nuclear Force

A

Binds together neutrons & protons to form nuclei

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14
Q

Mass Defect

A

The difference between the mass of any bound nucleus & sum of masses of its constituent nucleons

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15
Q

Binding Energy

A

Energy required to separate an atomic nucleus into its constituent protons & neutrons

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16
Q

Radioactive

A

An unstable nucleus that will spontaneously change into lower electron configuration

17
Q

Weak nuclear force

A

Action that cause transformation of neutron into a proton & electron

18
Q

Activity of Radioactive Sample

A

Number of disintegrations it undergoes per seconds

19
Q

Decay constant

A

Fraction of nuclei that decay per second

20
Q

Nuclear fission

A

Splitting of larger atom into smaller ones

21
Q

Nuclear fusion

A

Fusing 2 or more atoms into a larger atom

Physics (15 decks)

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