Electromagnetic Waves Quiz

Which of the following shows the CORRECT order of EM waves in decreasing wavelengths?

• Radio waves → Microwaves → Infrared radiation → Visible light → Ultraviolet rays → X-rays → Gamma rays

• Radio waves → Microwaves → Visible light → Infrared radiation → Ultraviolet rays → X-rays → Gamma rays

• Gamma rays → X-rays → Infrared radiation → Visible light → Ultraviolet rays → Microwaves → Radio waves

• Gamma rays → X-rays → Ultraviolet rays → Visible light → Infrared radiation → Microwaves → Radio waves

Which among the following facts about electromagnetic waves is the CORRECT explanation?

• They travel at a speed of 3.0 x 108 m/s.

• They require a medium to propagate.

• They have electric and magnetic components.

• They are made up of tiny bundles of energy called photons.

What would be the frequency of a blue light with a wavelength of about 4.62 x 10-7 m?

• 4.21 x 1014 Hz

• 5.30 x 1014 Hz

• 6.49 x 1014 Hz

• 7.58 x 1014 Hz

Microphones and cameras are examples of which component in radio communication?

• demodulator

• input transducer

• modulator

• output transducer

Which electromagnetic wave is most suited for growing plants in a greenhouse?

• Infrared rays

• Visible light

• Ultraviolet rays

• X-rays

Which among the statements below CORRECTLY describe the characteristics of AM and FM radio signals?

• AM signals can travel farther distances.

• FM signals have superior sound quality.

• AM signals are more expensive to generate.

• FM signals are more susceptible to interference.

Which EM wave is responsible for food production of plants through photosynthesis?

• Infrared rays

• Visible light

• Ultraviolet rays

• X-rays

What is the type of modulation achieved by varying the frequency of a carrier wave while keeping the amplitude constant?

• Amplitude Modulation (AM)

• Digital Modulation (DM)

• Frequency Modulation (FM)

• Phase Modulation (PM)

Which of the following lists correctly identifies the colors of white light in order of increasing wavelength?

• blue, green, yellow, orange, red, violet, indigo

• green, yellow, orange, red, blue, indigo, violet

• red, orange, yellow, green, blue, indigo, violet

• violet, indigo, blue, green, yellow, orange, red

Which type of wave can travel through vacuum?

• electromagnetic wave

• longitudinal wave

• mechanical wave

• sound wave