Electromagnetic Waves and Light

Electromagnetic spectrum & waves

Do you know what electromagnetic waves are? Well, you'll see!

Electromagnetic waves are similar with light waves. It is created by vibrations between electric field and magnetic field. The speed of electromagnetic waves are always same as the speed of light (300,000km/sec, can orbit around Earth seven and a half times in one second.

​Some text here about the topic of discussion.

What are electromagnetic waves?

This is about how much energy can an EM wave can carry. The product of the wavelength and the energy is always the speed of light.

Energy

Frequency means how often same things happen, and wavelength ​means how long two sets of electromagnetic waves and magnetic waves are. The product of the frequency and wavelength is always the speed of light.

Frequency and wavelength

Frequency, energy, and wavelength

For someone who might not understand, it means halve wavelength, double frequency and energy.

(One-third wavelength, triple frequency and energy, one-fourth frequency and energy, 4 times wavelength)​

There are seven types of them. They are radio, microwave, infrared, visible, ultraviolet, X-ray, and gamma.

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Remember to look carefully at the picture!!

Different types of electromagnetic waves

ARE YOU READY FOR THE QUESTIONS??

If you are, then go to the next slide to answer the questions, and if not, then go back.

Multiple Choice

Choose the words to fill in the blank:

Vibrations between ... and ... create EM waves.

• electric field and infrared rays

• magnetic field and ultraviolet rays

• electric field and magnetic field

• gamma rays and radio waves

Multiple Choice

How many types of EM rays are there?

• six

• ten

• eight

• seven

Multiple Choice

Choose a word to fill in the blank:

Halve the frequency. As a result, wavelength will ...

• be tripled

• be halved

• be doubled

• just stay the same

Multiple Choice

Choose a word to fill in the blank:

Gamma rays carry the biggest amount of ... among the seven kinds of EM rays.

• electric fields

• energy

• magnetic fields

• wavelength

Draw

Match:

Multiple Choice

Choose a word to fill in the blank:

The speed of light is equal to frequency multiplied by ...

• wavelength

• two

• energy

• eleven

Poll

How was this lesson?

• ★☆☆☆☆

  (I don't like this)

• ★★☆☆☆

  (This wasn't good)

• ★★★☆☆

  (Yeah..)

• ★★★★☆

  (It was fun!)

• ★★★★★

  (MAKE SOMETHING LIKE THIS AGAIN!!)

:)

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Hope you had put something about electromagnetic waves inside your brain! Good bye!​