Science 10

3. Module
1
Different
Forms of
EM Waves
Rowenick A. Guimmayen

4. At the end of the lesson, learners
should be able to:
identify the different region of the electromagnetic
spectrum

5. At the end of the lesson, learners
should be able to:
identify the different region of the electromagnetic
spectrum

8. What is a wave?
A wave can be described as
a disturbance that travels
through a medium from one
location to another location.

9. Let us Recall
What are the parts of a
wave?

10. Parts of a wave
Crest
Through
Wavelength
Amplitude
INFO

12. Let us Recall
What are the 3 kinds of
wave?

13. Mechanical Wave
Travels through a
medium such as solid,
liquid and gas. Ex.
Sound wave

14. Electromagnetic
Wave
Does not require a
medium to travel. It
can travel through a
vacuum.

15. Matter Wave
Electrons and particles

16. Mechanical Wave

17. Mechanical Wave

18. EM Wave

19. EM Wave

20. Matter Wave

21. Matter Wave

22. Seismic Wave
A. Mechanical
B. EM Wave

23. Light Wave
A. Mechanical wave
B. EM Wave

24. Let us observe

25. Let us observe

26. High Frequency
Low Frequency

27. What is Electromagnetic Wave?
Also known as EM Wave
It has both electric and magnetic wave
It does not need a medium to travel
They differ from one another in terms of wavelength
and frequency

28. What are the
characteristics
of EM Wave

29. Amplitude
The amount of energy
The higher the
amplitude, the more
energy

30. Wavelength
The shorter the
wavelength, the
higher the energy

31. Frequency
The number of waves
passing through a point at
a certain time.
It is expressed in Hertz (Hz)
The higher frequency, the
higher the energy

33. Dangerous
Safe

37. EM Spectrum
The gradual arrangement of EM waves from the
lowest to highest frequency.

38. IONIZING VS NON IONIZING
RADIATION

42. The Electromagnetic Theory
• Did you send text messages to somebody
today? Or have you ever tried cooking in a
microwave oven? Did you know that these
previously mentioned human activities make
use of microwaves? Microwaves carry
energy, and so with the other kinds of
electromagnetic waves. But what are
electromagnetic waves? How can these
waves become useful to us?

45. 1. What is the frequency of
radio waves with wavelength of
20 m?

46. What is the frequency of light
waves with wavelength of 5 X
10-7 m?

49. A ray, emitted from the sun, is shining through your
kitchen window into a prism. The prism then casts a
rainbow on the windowsill. You just so happen to have
a hand-held radiometer handy; closing your eyes you
place the instrument on a specific color of the rainbow.
You then open your eyes to see that the radiometer
measured the energy from that color at 3.0 x 10-
19 joules. Given Plank's constant of 6.6256 x 10-
34 joules/sec, what possible color did the radiometer
measure? How do we know this?