Electromagnetic Spectrum

What is the electromagnetic spectrum?

• The range of all types of electromagnetic radiation, including visible light, radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays.

• A type of sound wave that can be heard by humans.

• A spectrum of colors visible to the human eye only.

• The range of all types of mechanical waves, including sound and seismic waves.

What is ultraviolet radiation?

• A type of electromagnetic radiation with shorter wavelengths than visible light, known for its ability to cause sunburn.

• A type of radiation that is visible to the human eye and is responsible for colors.

• A type of radiation that has longer wavelengths than infrared radiation and is used in night vision.

• A type of radiation that is emitted by radioactive materials and can be harmful to health.

What is frequency in the context of waves?

• The speed at which waves travel through a medium.

• The number of waves that pass a point in one second, measured in hertz (Hz).

• The amplitude of the waves measured in decibels (dB).

• The wavelength of the waves measured in meters.

What is the relationship between frequency and wavelength?

• Frequency and wavelength are directly related; as frequency increases, wavelength increases.

• Frequency and wavelength are inversely related; as frequency increases, wavelength decreases.

• Frequency and wavelength have no relationship; they are independent of each other.

• Frequency and wavelength are equal; they represent the same physical quantity.

What are radio waves?

• Radio waves are the longest wavelength electromagnetic waves, used for communication such as radio and television signals.

• Radio waves are high-frequency waves used for cooking food in microwave ovens.

• Radio waves are short wavelength waves used for medical imaging.

• Radio waves are sound waves that travel through the air.

What are gamma rays?

• High-energy electromagnetic waves emitted by radioactive materials.

• Low-energy particles emitted during chemical reactions.

• Sound waves produced by nuclear reactions.

• Visible light emitted by stars.

What is the principle of energy transfer in waves?

• Waves transfer energy through vibrations, allowing energy to move from one place to another without the physical transfer of matter.

• Waves carry matter from one location to another through their motion.

• Energy is transferred in waves by the movement of particles in the medium only.

• Waves do not transfer energy; they only transfer information.

How does wavelength relate to energy in electromagnetic waves?

• As the wavelength of electromagnetic waves gets shorter, the energy of the waves increases.

• Longer wavelengths have higher energy than shorter wavelengths.

• Wavelength has no effect on the energy of electromagnetic waves.

• Energy is inversely proportional to wavelength in electromagnetic waves.

What is the speed of light?

• 150,000 kilometers per second (km/s)

• 299,792 kilometers per second (km/s)

• 500,000 kilometers per second (km/s)

• 1,000,000 kilometers per second (km/s)

What are microwaves?

• A type of electromagnetic radiation with longer wavelengths than infrared light, used in cooking and communication.

• A type of sound wave used in sonar technology.

• A type of visible light used in photography.

• A type of thermal radiation used in heating systems.