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X-rays

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Introduction to Light

1. Speed of light

2. Wavelength and frequency of light

3. Sources of light

3.1. Light sources based on black body radiation

3.2. Light emission due to changes in the energy levels of atoms

4. Luminous intensity and illuminance

5. Light perception

6. Forum

↓ Show theory [1] ↓

Detailed solution steps are available at:

https://en.openprof.com/wb/chapter:x-rays/3616/

Example 1.

Which type of electromagnetic wave is used in airport security scanners?

infra-red
microwaves
radio waves
X-rays

Example 2.

Microwaves and X-rays are regions of the electromagnetic spectrum.

Which statement about microwaves and X-rays is correct?

Microwaves and X-rays have the same frequency.
Microwaves and X-rays travel at the same speed in a vacuum.
Microwaves have a shorter wavelength than X-rays.
Microwaves travel at a lower speed than X-rays in a vacuum.

Visible light, X-rays, and microwaves are all components of the electromagnetic spectrum.

Which statement about the waves is correct?

In a vacuum, microwaves travel faster than visible light and have a shorter wavelength
In a vacuum, microwaves travel at the same speed as visible light and have a shorter wavelength.
In a vacuum, X-rays travel faster than visible light and have a shorter wavelength
In a vacuum, X-rays travel at the same speed as visible light and have a shorter wavelength.

The diagram shows the electromagnetic spectrum.

Which types of waves are E, F, and G?

	E	F	G
A	radio	visible light	X-rays
B	radio	X-rays	ultrasound
C	X-rays	radio	ultrasound
D	X-rays	visible light	radio

The diagram shows the electromagnetic spectrum.

A word is missing from the label below the spectrum. Which word is missing?

amplitude
frequency
speed
wavelength

Which group shows four electromagnetic waves in order, from the largest wavelength to the smallest?

microwaves, radio waves, X-rays, visible light
radio waves, microwaves, visible light, X-rays
visible light, X-rays, radio waves, microwaves
X-rays, visible light, microwaves, radio waves

The table shows different types of wave in the electromagnetic spectrum.

Where do all the waves travel at the same speed?

in a vacuum
in diamond
in glass
in water

Three sources of background radiation are listed.

cosmic rays
medical X-rays
radioactive emissions from radon gas from the ground

Which of these sources are naturally occurring?

1 and 3 only
1 only
2 and 3 only
2 only

Which row shows the nature of light waves, sound waves, and X-rays?

	light waves	sound waves	X-rays
A	longitudinal	longitudinal	transverse
B	longitudinal	transverse	longitudinal
C	transverse	longitudinal	transverse
D	transverse	transverse	longitudinal

10.

The diagram shows three types of electromagnetic radiation listed in a particular order. The

electromagnetic radiation is travelling in a vacuum.

Which quantities increase in magnitude going from left to right across the list?

frequency only
neither speed nor frequency
speed and frequency
speed only

11.

Which statement correctly compares radio waves and X-rays?

Radio waves have a longer wavelength and a greater speed in a vacuum.
Radio waves have a longer wavelength and the same speed in a vacuum.
Radio waves have a shorter wavelength and a greater speed in a vacuum.
Radio waves have a shorter wavelength and the same speed in a vacuum.

12.

Which type of electromagnetic wave is used in airport security scanners?

infra-red
microwaves
radio waves
X-rays

13.

The box contains a list of four types of wave.

How many waves in the list are transverse waves?

14.

State two uses of X-rays.
Describe two safety precautions taken by people using X-rays.

15.

A sportsman is feared to have broken a leg and is taken to the hospital to have his leg X-ray. Complete the following sentence about X-rays.

X-rays are a form of ..................................................................... radiation that have very ......................... wavelengths.

16.

Radiographer use X-ray machines in hospitals. X-rays can cause damage to living things.

State an example of the damage that may be caused by X-rays.

17.

State one precaution taken by the technicians who operate the X-ray machines.

18.

Describe how X-rays are used for security in airports.

19.

An injured leg may be checked for possible fractures using electromagnetic radiation. Which region of the electromagnetic spectrum is used? Tick one box.

20.

X-rays and light waves can both travel through a vacuum.

Identify the correct statement. Choose one.

21.

State one reason why it is necessary to take safety precautions when X-rays are used.