El espectro electromagnético

Electromagnetic waves can propagate in space without a medium, using electric and magnetic fields. These fields oscillate perpendicularly and form transverse waves. The electromagnetic spectrum includes a wide range of wavelengths, from radio waves to gamma rays. Natural sources like stars and artificial sources like microwaves emit electromagnetic radiation. As wavelength decreases, frequency and energy increase, leading to ionization, where atoms become charged ions. Electromagnetic radiation is crucial for survival.

What is the nature of the oscillation of electric and magnetic fields in electromagnetic waves?

• They oscillate in a circular motion.

• They do not oscillate.

• They oscillate parallel to each other.

• They oscillate perpendicular to each other.

Which of the following is NOT a part of the electromagnetic spectrum?

• Ultraviolet rays

• Radio waves

• Sound waves

• Gamma rays

How can waves in the electromagnetic spectrum be described?

• By their temperature

• By their color

• By their wavelength or frequency

• By their speed

What happens to the energy of electromagnetic waves as the wavelength decreases?

• The energy fluctuates

• The energy increases

• The energy remains constant

• The energy decreases

What is the process called when high-frequency waves release electrons from atoms?

• Radiation

• Ionization

• Reflection

• Conduction