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IB Physics Warm-up Subtopic 7.1

Total questions: 20

Worksheet time: 21mins

Name
Class
Date
1.
The period of an electromagnetic wave is 1.0ns. What are the frequency and wavelength of the wave? 
a)
A
b)
B
c)
C
d)
D
2.
Which statement about different types of electromagnetic wave is correct? 
a)
The frequency of infra-red waves is less than the frequency of blue light. 
b)
The frequency of radio waves is greater than the frequency of gamma rays.
c)
The wavelength of red light is less than the wavelength of ultraviolet waves.
d)
The wavelength of X-rays is greater than the wavelength of microwaves.
3.
Electromagnetic waves of wavelength λ and frequency f travel at speed c in a vacuum. What describes the wavelength and speed of electromagnetic waves of frequency f / 2? 
a)
A
b)
B
c)
C
d)
D
4.
The higher the frequency the ______ the energy. 
a)
higher
b)
lower
c)
neither, stays the same
5.

The lower the frequency the ______ the energy.

a)

higher

b)

lower

c)

neither, stays the same

6.
What do you have at 10^-5?
Wavelength Not Frequency
a)
Microwaves
b)
Infrared
c)
Radio
d)
X-Ray
7.
What do you have at 10^-2?
Wavelength Not Frequency
a)
Microwaves
b)
Infrared
c)
Radio
d)
X-Ray
8.
How much of the electromagnetic spectrum is made up of visible light?
a)
only a small portion
b)
a very l;arge portion
c)
about half
9.
For waves in any medium, as the wavelength decreases, what happens to the frequency?
a)
It also decrease
b)
It stays the same
c)
It increases
10.
The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of:
a)
increasing amplitutde
b)
increasing wavelength
c)
increasing frequency
11.
Which of the following lists the electromagnetic waves in order of increasing wavelength?
a)
X-rays, visible light, radio waves
b)
gamma rays, microwaves, UV rays
c)
infrared rays, radio waves, x-rays
12.
Which of the following lists the electromagnetic waves in order of decreasing frequency?
a)
X-rays, microwaves, infrared rays
b)
UV rays, visible light, x-rays
c)
infrared rays, microwaves, radio waves
13.

Calculate the energy of a gamma ray photon whose frequency is 5.02 x 1020 Hz?

a)

4.73 x 1072 eV

b)

2.07 x 10 6 eV

c)

3.33 x 10-13 eV

d)

1.21 x 10 35 eV

14.

What is the energy of light whose wavelength is 4.06 x 10-11 m?

a)

2.69 x 10-44 eV

b)

4.89 x 10-15 eV

c)

3.06 x 10 4 eV

d)

5.04 x 10-17 eV

15.
A particle of light is called a photon.
a)
True
b)
False
16.
1 eV is equal to
a)
1.6 × 10-19 J
b)
2.0 × 10-20 J
c)
3 J
d)
4 J
17.

What is the speed of light in a vacuum?

a)

3×1083\times10^8 m/s

b)

3×10−83\times10^{-8} m/s

c)

6.63×10346.63\times10^{34} J s

d)

6.63×10−346.63\times10^{-34} J s

18.

What is the value of Planck's constant?

a)

3×1083\times10^8 m/s

b)

3×10−83\times10^{-8} m/s

c)

6.63×10346.63\times10^{34} J s

d)

6.63×10−346.63\times10^{-34} J s

19.

Which of the following is TRUE about the frequency and energy in electromagnetic waves?

a)

As the frequency of an EM wave increases, the energy also increases.

b)

As the frequency of an EM wave increases, the energy decreases.

c)

The Planck's constant increases when the frequency and energy of an EM wave increase.

d)

There is no relation between the energy and the frequency of an EM wave.

20.

What is the frequency of green light that has a wavelength of 500 nm?

a)

6×10−36\times10^{-3}  Hz

b)

6×1056\times10^5  Hz

c)

6×10146\times10^{14}  Hz

d)

6×10−166\times10^{-16}  HZ