What is a property of all electromagnetic waves?

1.   ?    They are deflected by magnets.
2.   ?    They are positively charged.
3.   ?    They travel at the speed of sound.
4.   ?    They travel through a vacuum.

Which type of electromagnetic radiation travels at the highest speed through a vacuum?

1.   ?    gamma rays
2.   ?    light waves
3.   ?    radio waves
4.   ?    none - all have the same speed

X-rays are one form of electromagnetic radiation.
Which of the following is correct for X-rays?

1.   ?    Type of wave: longitudinal ; Speed of wave in vacuo: 340 m/s
2.   ?    Type of wave: longitudinal ; Speed of wave in vacuo: 3 x 10⁸ m/s
3.   ?    Type of wave: transverse ; Speed of wave in vacuo: 340 m/s
4.   ?    Type of wave: transverse ; Speed of wave in vacuo: 340 x 10⁸m/s

What is a property of all electromagnetic waves?

1.   ?    They are deflected by magnets.
2.   ?    They are positively charged.
3.   ?    They travel at the speed of sound.
4.   ?    They travel through a vacuum.

Which of the following has the longest wavelength?

1.   ?    Light rays
2.   ?    Microwaves
3.   ?    Radio waves
4.   ?    X-rays

The diagram shows different regions of the electromagnetic spectrum.

1.   ?    Microwaves
2.   ?    Sound waves
3.   ?    Ultraviolet radiation
4.   ?    X-radiation

The diagram represents some of the main parts of the electromagnetic spectrum.

1.   ?    1. radio waves; 2. ultraviolet; 3. visible light; 4. X-rays
2.   ?    1. radiowaves; 2. visible light; 3. ultraviolet; 4. X-rays
3.   ?    1. visible light; 2. ultraviolet; 3. X-rays; 4. radio-waves
4.   ?    1. visible light; 2. ultraviolet; 3. radiowaves; 4. X-rays

The type of electromagnetic radiation that has the longest wavelength is .........................

1.   ?    X-rays
2.   ?    visible light
3.   ?    ultra-violet rays
4.   ?    radio waves

Below is a diagram that shows some parts of the electromagnetic spectrum.

1.   ?    Infra-red and Sound
2.   ?    Infra-red and X-rays
3.   ?    Sound and Infra-red
4.   ?    X-rays and Infra-red

One of the following devices does not make use of electromagnetic waves in its operation.
Which one is it?

1.   ?    A loudspeaker
2.   ?    A telelvision set
3.   ?    A camera
4.   ?    A radio set

One of the properties below applies equally to visible light, X-rays, infra-red, ultra-violet and gamma rays.
Which one is it?

1.   ?    They are all damaging to health.
2.   ?    They all travel with the same speed in a vacuum.
3.   ?    They are all affected by magnetic field.
4.   ?    They can be detected by the human eye.

One of the following statements about electromagnetic waves is not true.
Which one is it?

1.   ?    Electromagnetic waves may have different wavelengths.
2.   ?    All electromagnetic waves travel at the same speed in a vacuum.
3.   ?    Electrfomagnetic waves may have a wide range of frequencies.
4.   ?    All transverse waves are electromagnetic waves.

Which statement is true for all the electromagnetic waves?

1.   ?    They are longitudinal.
2.   ?    They can be seen.
3.   ?    They have the same frequency in air.
4.   ?    They travel at the same speed in a vacuum.

A student warms her hands near a gas lamp.

1.   ?    A
2.   ?    B
3.   ?    C
4.   ?    D