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Worksheets004. Quantum Phenomena
Total questions: 37
Worksheet time: 38mins
The Photoelectric effect had profound consequences in the world of Physics. It proved that...
Electrons are waves
Light displayed particle-like behaviour
Light was a wave
The energy of electrons emitted was quanitzed
The amount of energy required to cause an electron to emit is called the
Threshold Frequency
The Kinetic Energy Max
The Intensity
The Work Function
The equation which links Energy to wavelength is...
E=hf
E=λhf
E=λhc
c=fλ
Which graph is the correct graph linking KE max of the electrons emitted to the frequency of the light?
A
B
C
D
Which of the following is true
All electrons are emitted with the same energy because it's one metal surface
Electrons are emitted with a range of energies up to infinite.
Electrons are emitted up to a range of energies up to a maximum value
The intensity of the light will decide the Kinetic Energy Max.
The work functions of different metals are shown. What is the work function of Aluminium in Joules?
2.7 x 1019
6.8x10-19
6.8 x 1019
2.7x10-19
Which statement is correct.
KE max = hf + φ
φ = hf + KE max
KE max = φ - hf
KE max = hf - φ
What happens if the intensity of the light is increased
The stopping potential is greater
The current increases
The colour of the light changes
The work function becomes higher
In the Photoelectric effect apparatus, which is used to measure Plank's constant, what happens if the wavelength of light is increased slightly?
The current reduces
The work function increases
The stopping potential increases
the KE max decreases
A very common absorption line which we use in Astronomy has 656 nm wavelength. Which colour is this?
Ultraviolet
Blue
Turquoise
Red
A fluorescent bulb is shown. Select the statements which are true of the fluorescent light bulb
The mercury vapour is there to balance the temperature of the light
The mercury vapour gives off white light
the mercury vapour gives of UV light
The zinc coating absorbs the light and de-excites directly, giving off all the energy in a photon of white light
The zinc coating absorbs the light and cascades back down, releasing a variety of lower energy photons
Photons of wavelength 290 nm are incident on a metal plate. The work function of the metal is 4.1 eV
What is the maximum kinetic energy of the emitted electrons?
0.19 eV
4.3 eV
6.9 eV
8.4 eV
The lines in the emission spectrum for hydrogen are formed from ___.
energy given off when the electron moves from higher energy levels to lower energy levels
electrons given off as hydrogen burns
protons given off when protons move from higher energy levels to lower energy levels
electrons given off as hydrogen cools
Which color has the highest frequency?
green
blue
red
yellow
Which color has the highest energy per photon quanta?
green
blue
red
yellow
Which color has the longest waves?
red
orange
yellow
green
Energy of a photon is ___ proportional to frequency.
directly
inversely
Frequency of light is ___ proportional to wavelength.
directly
inversely
An atom in the inner coating of a fluorescent tube absorbs a photon of ultraviolet radiation. This causes excitation of the atom from its ground state. A photon of visible light is then emitted.
Which energy level diagram represents this process?
The diagram shows an energy-level diagram for a hydrogen atom.
Electrons, each having a kinetic energy of 2.0 × 10–18 J, collide with atoms of hydrogen in their ground state. Photons are emitted when the atoms de-excite.
How many different wavelengths can be observed with incident electrons of this energy?
1
3
6
7
Which row links both the photoelectric effect and electron diffraction to the properties of waves and particles?
A
B
C
D
Electrons moving in a beam have the same de Broglie wavelength as protons in a separate beam moving at a speed of 2.8 × 104 m s–1.
What is the speed of the electrons?
1.5 × 101 m s–1
2.8 × 104 m s–1
1.2 × 106 m s–1
5.1 × 107 m s–1
What is the ground state?
none of these
where all the electrons are located
the highest energy level
the lowest energy level
Which type of visible light has the lowest energy?
Red
Yellow
Green
Violet
Which type of visible light has the highest energy?
Red
Yellow
Green
Violet
If an electron moves from n=4 to n=2 it ____
absorbs energy
releases energy
Light is emitted when electrons
move from one atom to another.
collide with one another, releasing energy.
move from a lower energy level to a higher energy level.
move from a higher energy level to a lower energy level.
When the frequency of a wave increases, the wavelength ___________.
increases
decreases
stays the same
An atom that has gained energy beyond normal is said to be ...
excited
grounded
naturalized
What is the amount of energy required to remove an electron from an atom?
atomic energy
ionization energy
ionic energy
electron energy
What was Tom's job before he became a teacher?
What 3 A levels did Tom study?
