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Summary Electromagnetic Spectrum in a Nutshell
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  • Course
  • Physics
  • Institution
  • Book
  • Cambridge O Level Physics

This document contains an in-depth summary of the electromagnetic spectrum chapter. The contents are arranged according to the syllabus of Cambridge O Level Physics. It can also prove helpful for any high school student.

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Document information

  • No
  • 3.3
  • April 7, 2024
  • 4
  • 2022/2023
  • Summary

Subjects

  • physics
  • o level
  • cambridge
  • electromagnetic spectrum
  • high school
  • grade 9
  • science
  • summary
  • notes

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Electromagnetic Spectrum in a Nutshell
Electromagnetic spectrum is the range of wavelengths or frequencies over which
electromagnetic radiation extends. This spectrum includes:
1. Gamma Ray
λ= 1.0 X 10-11 m
Source: Radioactive matter
2. X-Ray
λ= 1.0 X 10-9 m
Source: X-ray tube
Produced due to the rapid deceleration of electrons by a metal target
in an X-ray tube
3. Ultraviolet Radiation (UV)
λ= 1.0 X 10-7 m
Source: Mercury lamp
4. Visible Light (red, orange, yellow, green, blue, indigo, violet)
λViolet= 4.0 X 10-7 m
λRed= 7.0 X 10-7 m
Source: Sun
5. Infrared Radiation
λ= 1.0 X 10-5 m
Source: Electric fire


Below 500°C => hot, not glowing: emits only IR Increasing Decreasing
wavelength wavelength
At about 500°C => red hot, glowing: emits IR and red light
& &
At about 1500°C => white hot: emits IR and white light Decreasing Increasing

frequency frequency


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