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The formula of atoms vibration energy:

$$E=nhf$$
$$E=\frac{nh}{f}$$
$$E=nhv$$
$$E=\frac{nf}{h}$$

If you know that energy of a vibrating atom is quantized, then which of the following is wrong?

1hf
0.2hf
2hf
4hf

Which of the following can represent an energy of vibration?

$$\frac{4}{2}hf$$
$$3.5hf$$
$$\frac{3}{2}hf$$
$$2.1hf$$

The least value of an atom’s vibration energy.

$$hf$$
$$2hf$$
$$0.5hf$$
$$\frac{3}{2}hf$$

The atom’s energy is quantized means that its values are:

Odd
Even
Fraction
Integer

A particle that has no mass and carries a quantum of energy.

Electron
Photon
Proton
Neutron

An atom absorbs a photon with frequency ${10}^{12}Hz$ , the change in the atom’s energy will …. ( $h={6.626\times10}^{-34}\ J/Hz$ ).

increase by ${6.626\times10}^{-34}$
increase by ${6.626\times10}^{-22}\ J$
decrease by ${6.626\times10}^{-34}\ J$
decrease by ${6.626\times10}^{-22}\ J$

The minimum frequency for incident light that is able to eject electrons from an element’s atoms.

Photon frequency
Threshold
Work function
Microwave frequency

The ejection of electrons when an electromagnetic radiation falls on an object is called:

Water waves
Photoelectric effect
Doppler effect
Compton effect

Electrons are ejected from an atom only if the frequency of the incident radiation is greater than a certain minimum value is called:

Radiation frequency
Photon frequency
Light frequency
Threshold frequency

When an ultraviolet radiation falls on a negative charged zinc board, it ejects an electron from zinc because:

The frequency of the ultraviolet radiation is larger than the threshold frequency of zinc.
The frequency of the ultraviolet radiation is smaller than the threshold frequency of zinc
The energy of the ultraviolet is smaller than the function of zinc
The wavelength of the ultraviolet radiation is larger than the wavelength of the threshold of zinc

The photon was discovered by:

Einstein
De Broglie
Pauli
Newton

If the threshold frequency of a metal was $4.4\times{10}^{14}Hz$ What is the needed energy to eject the electron from the surface of the metal?

$${4.4\times10}^{14}+h$$
$${4.4\times10}^{14}-h$$
$${4.4\times10}^{14}h$$
$${4.4\times10}^{14}\div h$$

Einstein explained the photoelectric effect by saying that visible light consists of quantized bundles of energy called:

Electrons
Protons
Neutrons
Photons

The product of Planck’s constant and the frequency of the photon is called:

Wavelength of a photon
Energy of a photon
Speed of a photon
Mass of a photon

The energy of a photon is:

Directly proportional with the wavelength
Inversely proportional with the wavelength
Directly proportional with the mass
Inversely proportional with the mass

What is the energy of a photon, if its frequency is

$1\times{10}^{15}Hz$

? Knowing that Planck’s constant is

$6.63\times{10}^{-34}J.s$

?

$${6.63\times10}^{-19}J$$
$$6.63\times{10}^{19}J$$
$$6.63\times{10}^{-49}J$$
$${6.63\times10}^{49}J$$

Wave A has frequency of ${10}^{23}Hz$ , and wave B has a wavelength of ${10}^{-12}$ . The right comparison between the two energies are:

B < A
A < B
A ≤ B
B ≤ A

If the wave frequency increases, then…

Its energy decreases
Its wavelength increases
Its mass increases
Its energy increases

Which of the following frequencies has the lowest energy?

$$6\times{10}^{20}Hz$$
$$1.5\times{10}^9Hz$$
$$7.5{\times10}^6Hz$$
$$5\times{10}^{13}Hz$$

An incident photon with frequency $f_0$ falls on a metal with work function of ${hf}_0$ . As a result, the electron will:

Be ejected with no kinetic energy
Be ejected with kinetic energy of $${hf}_0$$
Not be ejected, and will not have kinetic energy
Not be ejected, but its kinetic energy will increase but $${hf}_0$$

The figure shows the relationship between the kinetic energy and frequency of a metal. What point represents threshold frequency?

A
B
C
D

For electromagnetic waves, which of these following statements is correct?

When frequency increases, energy decreases
When wavelength increases, energy increases
When frequency increases, wavelength increases
When wavelength increases, frequency decreases

If the energy of a photon falling on a metal surface was 4.7eV, and work function is 3.7eV, then the kinetic energy of ejected electrons is:

4eV
1eV
5eV
2.5eV

A photon with a frequency of

$110\times{10}^{14}Hz$

falls on a surface with a threshold frequency of

$10\times{10}^{14}Hz$

. What is the kinetic energy? Knowing that Planck’s constant is

${6.63\times10}^{-34}J.s$

$$6.63\times{10}^{-34}J$$
$$6.63\times{10}^{-18}J$$
$$110\times{10}^{14}J$$
$$120\times{10}^{14}J$$

Energy of an electron moving across an electric potential difference of one volt is called:

Electron volt
Joule
Watt
Calorie

SAAT - Physics

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