# Lesson Worksheet: Electromagnetic Waves Science

In this worksheet, we will practice relating oscillating electric and magnetic fields to electromagnetic waves.

Q1:

Which color of visible light is an electromagnetic wave of a longer wavelength, red or violet?

• AViolet
• BRed

Q2:

An electromagnetic wave contains electric and magnetic fields, shown in the following diagrams in different colors from each other. Which of the diagrams correctly shows how the directions of oscillation of the electric and magnetic fields compare to each other?

• A • B • C • D • E Q3:

Which of the following is the approximate wavelength of the shortest-wavelength electromagnetic wave that is visible as light?

• A400 nanometers
• B700 nanometers
• C1,000 nanometers
• D500 nanometers
• E300 nanometers

Q4:

An electromagnetic wave travels at a right angle to the direction of its electric field and to the direction of its magnetic field. Which of the following correctly describes how the electromagnetic wave is a transverse or longitudinal wave? • AElectrically transverse and magnetically longitudinal
• BMagnetically transverse and electrically longitudinal
• CElectrically transverse and magnetically transverse
• DElectrically longitudinal and magnetically longitudinal

Q5:

An electromagnetic wave contains electric and magnetic fields, shown in the diagram in different colors from each other. The electromagnetic wave is produced at the point where the colored axes cross each other. Which color axis does the electromagnetic wave move along? • AThe red axis
• BThe purple axis
• CThe blue axis

Q6:

An electromagnetic wave travels at a right angle to the direction of its electric field and to the direction of its magnetic field. The wave moves through a vacuum. Which of the following is closest to the speed at which the wave travels? • AThree hundred million meters per second
• BThree thousand meters per second
• CThree million meters per second
• DThree hundred thousand meters per second
• EThree hundred meters per second

Q7:

Which of the following is the approximate wavelength of the longest-wavelength electromagnetic wave that is visible as light?

• A700 nanometers
• B500 nanometers
• C300 nanometers
• D400 nanometers
• E1,000 nanometers

Q8:

Electromagnetic waves travel at a right angle to the direction of their electric fields and to the direction of their magnetic fields. Both of the waves shown move through a vacuum. How do the speeds of the two waves compare? • AThe green-and-yellow wave travels slower than the blue-and-pink wave.
• BThe green-and-yellow wave travels faster than the blue-and-pink wave.
• CBoth waves travel at the same speed.

Q9:

Electromagnetic waves travel at a right angle to the direction of their electric fields and to the direction of their magnetic fields. Both of the waves shown move through a vacuum. One of the waves is red light and the other is violet light. Which of the waves is the red light? • AThe wave that contains fewer wavelengths
• BThe wave that contains more wavelengths

Q10:

Electromagnetic waves travel at a right angle to the direction of their electric fields and to the direction of their magnetic fields. Both of the waves shown move through a vacuum. How do the wavelengths of the two waves compare? • AThe green-and-yellow wave has a shorter wavelength than the blue-and-pink wave.
• BThe green-and-yellow wave has a longer wavelength than the blue-and-pink wave.
• CBoth waves have the same wavelength.

This lesson includes 15 additional questions for subscribers.