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# QUARTER 2-LESSON 2.pptx

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# QUARTER 2-LESSON 2.pptx

ELECTROMAGNETIC WAVES
PRACTICAL APPLICATIONS

ELECTROMAGNETIC WAVES
PRACTICAL APPLICATIONS

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### QUARTER 2-LESSON 2.pptx

1. 1. LESSON 2 Prepared by: WENDY B. LABASILLA Science 10 Teacher
2. 2. RADIO WAVE MICROWAVE INFRARED VISIBLE LIGHT ULTRAVIOLET RAY X-RAY GAMMA RAY A G G
3. 3. What’s New Word Box • cellphone • radio • television • RADAR • microwave • oven • remote control • camera • X-ray • bulb • flashlight • satellite What do you think are these devices for? What form of EM waves make them work?
4. 4. ASSIGNMENT! GIVE AT LEAST 5 HARMFUL EFFECTS OF ELECTROMAGNETIC WAVES
5. 5. ASSIGNMENT! BRING THE FOLLOWING BY GROUP : ▪ water ▪ flashlight ▪ shallow pan ▪ small mirror ▪ piece of paper or white surface

### Editor's Notes

• Can you still remember the different forms of Electromagnetic waves you have learned from the previous module? While all these EM waves move through space at the same speed of about three hundred (300) million meters per second, their wavelengths, frequencies, and energies differ. This is the reason why they are arranged accordingly in a scheme called Electromagnetic Spectrum. Let me remind you that wavelength has an inverse relation with frequency and energy. So, if wavelength increases, what will happen to the frequency of the wave? If the wavelength of an EM wave decreases, what will be the effect in its energy? Let’s compare the relative wavelengths, frequencies, and energies of the different regions of the Electromagnetic spectrum.
• Can you still remember the different forms of Electromagnetic waves you have learned from the previous module? While all these EM waves move through space at the same speed of about three hundred (300) million meters per second, their wavelengths, frequencies, and energies differ. This is the reason why they are arranged accordingly in a scheme called Electromagnetic Spectrum. Let me remind you that wavelength has an inverse relation with frequency and energy. So, if wavelength increases, what will happen to the frequency of the wave? If the wavelength of an EM wave decreases, what will be the effect in its energy? Let’s compare the relative wavelengths, frequencies, and energies of the different regions of the Electromagnetic spectrum.
• Can you still remember the different forms of Electromagnetic waves you have learned from the previous module? While all these EM waves move through space at the same speed of about three hundred (300) million meters per second, their wavelengths, frequencies, and energies differ. This is the reason why they are arranged accordingly in a scheme called Electromagnetic Spectrum. Let me remind you that wavelength has an inverse relation with frequency and energy. So, if wavelength increases, what will happen to the frequency of the wave? If the wavelength of an EM wave decreases, what will be the effect in its energy? Let’s compare the relative wavelengths, frequencies, and energies of the different regions of the Electromagnetic spectrum.
• RADAR stands for RAdio Detecting And Ranging and as indicated by the name, it is based on the use of radio waves. Radars send out electromagnetic waves similar to wireless computer networks and mobile phones.