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Quantum Physics

Total questions: 64

Worksheet time: 5hrs 20mins

Name
Class
Date
1.

If waves can behave like particles, then particles can behave like a wave. This is the idea behind...

a)

Quantization of Energy

b)

Photoelectric Effect

c)

Compton Effect

d)

deBroglie Waves

e)

Uncertainty Principle

2.

A ____ is a discrete, quantized bundle of energy

a)

Photoelectric effect

b)

Photon

c)

Quantized

d)

Proton

3.

The equation which links Energy to wavelength is...

a)

E=hfE=hf

b)

E=hfλE=\frac{hf}{\lambda}

c)

E=hcλE=\frac{hc}{\lambda}

d)

c=fλc=f\lambda

4.

What does the p stand for?

a)

power

b)

momentum

c)

pressure

d)

principle axis

5.

Which subatomic particle is negatively charged?

a)

proton

b)

neutron

c)

electron

d)

quark

6.

Photoelectrons will be ejected from a material surface if?

a)

The threshold frequency is greater than the photon frequency

b)

The work function is less than the photon energy

c)

The intensity of light is high enough

d)

The wavelength of photon is maximum

7.

A monochromatic light beam with a quantum energy of 9.0 eV is incident upon a photocell. The work function of the photocell is 4.1 eV. What is the maximum kinetic energy of the electron.

a)

4.2 eV

b)

4.4 eV

c)

4.7 eV

d)

4.9 eV

8.

In an experiment, photoelectric effect is observed in metal A when light with frequency (f ) falls on the metal. If the light frequency used in this experiment is doubled, the photoelectrons

a)

Will not be ejected

b)

Will be ejected as observed in the previous

c)

Will be ejected with greater number of photoelectrons

d)

Will be ejected with greater kinetic energy

9.

A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the 400 nm light is replaced by λ= 300 nm light of the same intensity, what is the result?

a)

More electrons are emitted in a given time interval

b)

Fewer electrons are emitted in a given time interval

c)

Emitted electrons are more energetic

d)

Emitted electrons are less energetic

10.

A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the light intensity is increased (without changing λ ), what is the result?

a)

More electrons are emitted in a given time interval

b)

Fewer electrons are emitted in a given time interval

c)

Emitted electrons are more energetic

d)

Emitted electrons are less energetic

11.

True or False? The wavelength and frequency of all waves are inversely proportional to each other.

a)

True

b)

False

12.

Which of the following colors of visible light has the highest frequency?

a)

Blue

b)

Green

c)

Orange

d)

Red

e)

Violet

13.

Which of the following colors of visible light has the lowest frequency?

a)

blue

b)

green

c)

yellow

d)

red

e)

violet

14.

Which of the following colors of visible light has the longest wavelength?

a)

Blue

b)

Green

c)

Yellow

d)

Red

e)

Violet

15.

Which color of light moves at the fastest speed?

a)

blue

b)

green

c)

yellow

d)

red

e)

All light travels at the same speed.

16.
The photoelectric effect only occurs if the light shining on the metal is:
a)
coherent.
b)
above a minimum intensity.
c)
above a minimum frequency.
d)
above a minimum wavelength.
17.

Wave -particle duality is supported by...

a)

electrons behaving as particles with ordinary matter

b)

electrons behaving as waves when travelling through space

c)

the photo electric effect

d)

all of the above

18.

Planck's constant can be found ...

a)

energy of a particle x speed of light / wavelength

b)

energy of a particle x speed of light / frequency of light

c)

energy of a particle x wavelength / speed of light

d)

slope of the cut-off voltage vs frequency graph

19.

the minimum frequency for which the photoelectric effect can occur is called the

a)

absolute frequency

b)

cut off frequency

c)

Lyman frequency

d)

threshold frequency

20.

De Broglie equation

a)

relates the momentum of a mass to its wavelength

b)

relates the energy of a mass to its wavelength

c)

relates the frequency of a mass to its wavelength

d)

relates the work function of a mass to its wavelength

21.

All electromagnetic waves...

a)

travel at the speed of light

b)

can be reflected

c)

can exhibit interference

d)

all of the above

22.

The energy of an emitted photon can be calculated from ...

a)

Plancks constant x frequency of the photon

b)

h x c / wavelength of the light emitted

c)

the difference in the energy levels

d)

all of the above

23.

When light of specific frequencies is shined on a surface, electrons are ejected from the surface. This is the idea behind...

a)

Quantization of Energy

b)

Photoelectric Effect

c)

Compton Effect

d)

deBroglie Waves

e)

Uncertainty Principle

24.

If waves can behave like particles, then particles can behave like a wave. This is the idea behind...

a)

Quantization of Energy

b)

Photoelectric Effect

c)

Compton Effect

d)

deBroglie Waves

e)

Uncertainty Principle

25.

Photoelectrons will be ejected from a material surface if?

a)

The threshold frequency is greater than the photon frequency

b)

The work function is less than the photon energy

c)

The intensity of light is high enough

d)

The wavelength of photon is maximum

26.

The energy of a photon is directly proportional to its ______ and inversely proportional to its ______.

a)

intensity - speed

b)

wavelength - frequency

c)

frequency - wavelength

d)

intensity - wavelength

27.

A particle of light is called a……

a)

Photon

b)

Photoelectron

c)

Proton

d)

Electron

28.

If the brightness of a beam of light increases without changing its colour, the ______ will increase.

a)

number of photons

b)

energy of the photons

c)

frequency of the light

d)

wavelength of the photons

29.

The graph shows maximum kinetic energy of emitted electrons against frequency of incident light for a number of different metals.

The threshold frequency is determined by:

a)

the x-intercept

b)

the y-intercept

c)

the gradient

d)

the area under the graph

30.

Radiation and matter that has the properties of both particle and wave is called

a)

confusion

b)

mixing

c)

entanglement

d)

wave-particle duality

31.

Max Planck's great discovery was that radiation energy is emitted in packets that he called

a)

quanta

b)

wave functions

c)

photons

d)

electrons

32.

In an electron microscope , light source is replaced by the beam of very fast moving __________.

a)

neutron

b)

proton

c)

electron

d)

photon

33.

Electron microscope is much more powerful than a

a)

compound microscope

b)

simple microscope

c)

stereo microscope

d)

optical microscope

34.

A _______ is an idealised body that is able to absorb all electromagnetic radiation that falls on it.

_______ merupakan suatu jasad unggul yang berupaya menyerap semua sinaran elektromagnet yang jatuh padanya.

a)

Black body

Jasad hitam

b)

White body

Jasad putih

c)

Planck’s body

Jasad Planck

d)

Radiator body

Jasad pemancar

35.

A black body can emit thermal radiation depending on its _______.

Jasad hitam juga dapat memancarkan sinaran termal bergantung pada _______.

a)

Pressure

Tekanan

b)

Volume

Isipadu

c)

Temperature

Suhu

d)

Light intensity

Keamatan cahaya

36.

_______ is a discrete energy packet and not a continuous energy.

_______ ialah paket tenaga yang diskrit dan bukan tenaga selanjar.

a)

Quantum theory

Teori Quantum

b)

Quantum of energy

Kuantum tenaga

c)

Photon

Foton

d)

Wave-Particle Duality

Kedualan Gelombang-Zarah

37.

A particle is said to have wave-particle duality when that particle exhibits the properties of both _______ and _______

Suatu zarah dikatakan bersifat kedualan gelombang-zarah apabila zarah tersebut menunjukkan kedua-dua sifat _______ dan _______

a)

Wave, Atom

Gelombang, Atom

b)

Wave, Light

Gelombang, Cahaya

c)

Electron, Particle

Elektron, Zarah

d)

Wave, Particle

Gelombang, Zarah

38.

a)

A

b)

B

c)

C

d)

D

39.

a)

A

b)

B

c)

C

d)

D

40.

a)

A

b)

B

c)

C

d)

D

41.

a)

A

b)

B

c)

C

d)

D

42.

a)

A

b)

B

c)

C

d)

D

43.

a)

A

b)

B

c)

C

d)

D

44.

a)

A

b)

B

c)

C

d)

D

45.

a)

A

b)

B

c)

C

d)

D

46.

a)

A

b)

B

c)

C

d)

D

47.

a)

A

b)

B

c)

C

48.

a)

A

b)

B

c)

C

d)

D

49.

a)

A

b)

B

c)

C

d)

D

50.

a)

A

b)

B

c)

C

d)

D

51.

a)

A

b)

B

c)

C

d)

D

52.

a)

A

b)

B

c)

C

d)

D

53.

a)

A

b)

B

c)

C

d)

D

54.

a)

A

b)

B

c)

C

d)

D

55.

a)

A

b)

B

c)

C

d)

D

56.

a)

A

b)

B

c)

C

d)

D

57.

a)

A

b)

B

c)

C

d)

D

58.

a)

A

b)

B

c)

C

d)

D

59.

a)

A

b)

B

c)

C

d)

D

60.

a)

A

b)

B

c)

C

d)

D

61.

a)

A

b)

B

c)

C

d)

D

62.

a)

A

b)

B

c)

C

d)

D

63.

De Broglie equation

a)

relates the momentum of a mass to its wavelength

b)

relates the energy of a mass to its wavelength

c)

relates the frequency of a mass to its wavelength

d)

relates the work function of a mass to its wavelength

64.

The SI unit of frequency is the __________.

a)

meter

b)

second

c)

hertz

d)

meter per second

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