The document discusses the electromagnetic spectrum, which includes various types of electromagnetic waves ranging from radio waves to gamma rays. It provides details on the wavelength, frequency and properties of different types of electromagnetic waves, including infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays. It explains the historical discoveries of these various types of electromagnetic waves by scientists like Maxwell, Hertz, Ritter, and Roentgen that expanded our understanding of this aspect of physics.

1. ,
,
,
, etc.

2. ,
, x-rays

3. 1.
2.
3.
4.
5.
http://www.electron.rmutphysics.com/news/index.php?option=com_content&t

4. (Electromagnetic disturbance)

5. "

6. 3x108 m/s

8. 1.
infrared rays)
-rays)
light)

9. 1.
Ultraviolet rays)
X-rays)
-rays)
-rays)

10. RADIO FREQUENCY )
JAMES CLERK MAXWELL
1864
Heinrich Rudolf Hertz

11. 104 - 109 Hz(
2
(GROUND WAVE )
Surface wave

12. (SKY WAVE )

13. A.M. = amplitude modulation)
530 - 1600 kHz(
"
"

14. F.M. = frequency modulation)
(
88 - 108 MHz

17. 108 - 1012 Hz

18. 1.
(Reflection)

19. 2.
Transmission)

20. 3.
Absorption)

22. 1011 – 1014
nm-1 mm
700

23. near –
and mid infrared

24. far infrared)
near infrared)

25. :

26. light)
7x10-7
1014Hz
4x10-7 -

30. Ultraviolet rays)
Johann Wilhelm Ritter)

31. Ultraviolet rays)
ultra)
violet)

32. Ultraviolet
rays)
1015 - 1018 Hz
ultraviolet )
UV)
380 nm - 60 nm

33. UVA

315 nm
UVB)

280 nm
UVC)

nm
380-
315-
< 280

34. -

35. -

36. 8
2438
Wilhelm Konrad Roenig

37. X-rays)
1016 - 1022
Hz
10-8 - 10-13

38. bremstralung

40. x-ray crystallog
x-ray microscopic analysis)

42. X-Ray)
-
-