Question

which of the following statements about the electromagnetic spectrum is true? Select ALL true statements. A.)The electromagnetic spectrum is composed of many different wavelengths. B.)The light we see is a portion of the electromagnetic spectrum. C.)The sun emits electromagnetic radiation in the electromagnetic spectrum. D.)All objects emit radiation found in the electromagnetic spectrum. E.)The electromagnetic spectrum does not include visible light wavelengths.

Answer 1

A.)The electromagnetic spectrum is composed of many different wavelengths.

B.)The light we see is a portion of the electromagnetic spectrum.

C.)The sun emits electromagnetic radiation in the electromagnetic spectrum.

D.)All objects emit radiation found in the electromagnetic spectrum.

Step-by-step explanation:

The first four choices are correct.

Electromagnetic spectrum is made up of radiations that ranges from extremely powerful and ionizing gamma rays to very weak radio waves.

• It is a broad spectrum of different waves which have various wavelengths and frequencies. The more energetic the wave, the lower the wavelength and higher the frequency.
• Visible light is a portion of the broad electromagnetic spectrum within the wavelength range of 400-700nm.
• The sun emits the bulk of its radiations within the limit of the spectrum. This is correct and it provides the energy needed on our planet.
• All objects emits radiations based on their temperature.

Electromagnetic radiations found in the spectrum do not require a material medium for their propagation.