Lesson Worksheet: The Electromagnetic Spectrum Physics • 9th Grade

In this worksheet, we will practice analyzing the electromagnetic spectrum by identifying and describing types of electromagnetic radiation and their sources.

Q1:

What is the name of the type of electromagnetic radiation that has the longest wavelengths?

  • AGamma rays
  • BInfrared waves
  • CRadio waves
  • DMicrowaves
  • EX-rays

Q2:

The table shows a set of types of electromagnetic waves and the orders of magnitude of their wavelengths.

RadioMicrowaveInfraredVisibleUltravioletX-RayGamma Ray
>1 m10 m10 m10 m10 m10 m<10 m

Using the values from the table, how many wavelengths of ultraviolet radiation would have the same total length as one wavelength of infrared radiation? Answer in standard form.

  • A10
  • B10
  • C10
  • D10
  • E10

Using the values from the table, how many wavelengths of the longest wavelength gamma radiation would have the same total length as one wavelength of X-ray radiation? Answer in standard form.

  • A10
  • B10
  • C10
  • D10
  • E10

Q3:

Which of the following could be a source of X-ray radiation?

  • AThermal motion of atoms and molecules
  • BHigh-speed electrons impacting on a metal plate
  • CDecaying atomic nuclei
  • DAlternating electric currents
  • ENone of the answers is correct.

Q4:

Which of the following could be a source of infrared radiation?

  • AAlternating electric currents
  • BDirect electric currents
  • CThermal motion of atoms and molecules
  • DNone of the answers is correct.
  • EDecaying atomic nuclei

Q5:

Which of the following could be a source of radio waves?

  • AAlternating electric currents
  • BDecaying atomic nuclei
  • CHigh-speed electrons impacting on a metal plate
  • DDirect electric currents
  • ENone of the answers is correct.

Q6:

What is the name of the type of electromagnetic radiation that has the lowest frequencies?

  • AMicrowaves
  • BRadio waves
  • CGamma rays
  • DX-rays
  • EUltrasonic waves

Q7:

What is the name of the type of electromagnetic radiation that has the shortest wavelengths?

  • AGamma rays
  • BX-rays
  • CUltrasonic waves
  • D𝑃-waves
  • EMicrowaves

Q8:

What is the name of the type of electromagnetic radiation that has the highest frequencies?

  • AS-waves
  • BLongitudinal waves
  • CGamma rays
  • DX-rays
  • EUltrasonic waves

Q9:

Which of the following types of waves is a part of the electromagnetic spectrum?

  • AS-waves
  • BUltrasonic waves
  • CLongitudinal waves
  • DGamma rays

Q10:

Which of the following types of waves is not a part of the electromagnetic spectrum?

  • AP-waves
  • BX-rays
  • CGamma rays
  • DMicrowaves
  • EInfrared waves

This lesson includes 18 additional questions for subscribers.

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