Electromagnetic Spectrum Review

Electromagnetic Spectrum Review

Tuesday, October 12, 2021

​Learning Target: I can differentiate between each of the waves in the electromagnetic spectrum.

Poll

What color will you see when red, blue, and green come together?

• black

• purple

• white

• orange

​Go to shared screen for video

Multiple Choice

What color do you seen when you mix red, green, and blue light together?

• black

• orange

• white

• purple

Poll

Which of these is the same form of energy as light?

• radio waves

• sound waves

• electricity

• potential energy

Poll

Which of these is NOT a type of electromagnetic radiation that comes from the sun?

• visible light

• infrared light

• ultraviolet radiation

• sound energy

Open Ended

Three students are arguing about the reason that an apple appears red. Student A claims that it is because an apple absorbs the color red and reflects all other colors away from it. Student B claims that it is because an apple absorbs every other color of light and only the red is reflected. Student C argues that an apple gives off its own rays of red light. With which student do you agree and WHY???

Go to my shared screen for video​

Multiple Choice

Which of these is the same form of energy as light?

• radio waves

• sound waves

• electricity

• potential energy

Multiple Choice

Which of these is NOT a type of electromagnetic radiation that comes from the sun?

• visible light

• infrared light

• ultraviolet light

• sound energy

Multiple Choice

Three students are arguing about the reason that an apple appears red. Student A claims that it is because an apple absorbs the color red and reflects all other colors away from it. Student B claims that it is because an apple absorbs every other color of light and only the red is reflected. Student C argues that an apple gives off its own rays of red light.

Which student is correct?

• A

• B

• C

​Reflection of Light = Color

​Three students are arguing about the reason that an apple appears red. Student A claims that it is because an apple absorbs the color red and reflects all other colors away from it. Student B claims that it is because an apple absorbs every other color of light and only the red is reflected. Student C argues that an apple gives off its own rays of red light. With which student do you agree and WHY???

​

​Student B is correct because an object absorbs all other colors EXCEPT the one that you SEE.

Poll

Which color in the visible spectrum has the most energy?

• red

• green

• yellow

• violet

Poll

What is the longest wavelength of the visible spectrum?

• violet

• orange

• green

• red

​Visible light spectrum range is 700nm to 400nm. ​

​Red is the least powerful because the wavelengths are further apart.

​​Violet is the most powerful because the wavelengths are closer together.

​The wavelength of the color red is about 700nm.

​ Longer wavelength = less frequency = lower power

​The wavelength of the color VIOLET is about 400nm.

​ Shorter wavelength = more frequency = more power

Multiple Choice

What color in the visible spectrum has the most power?

• violet

• green

• yellow

• red

Multiple Choice

What color has the longest wavelength in the visible spectrum?

• violet

• green

• yellow

• red

Open Ended

Why is the sky blue?

Go to my shared screen for video​

Poll

Do you now know why an apple is red?

• Yes

• No

• Kinda

​Visible Spectrum and Color

• ​The seven colors of visible light are red, orange, yellow, green, blue, indigo, and violet. Their order is often remembered by the mnemonic Roy G. Biv, and the order of the colors actually does matter!

• Visible light is a spectrum. The frequency of the wave determines the the color, with red having the lowest frequency and violet having the highest frequency.

• ​Therefore, RED has less power than VIOLET

Multiple Choice

How many types of waves can be found in the electromagnetic spectrum?

• 3

• 4

• 9

• 7

Multiple Choice

What color has the shortest wavelength and highest frequency?

• violet

• green

• yellow

• red

​Remember, I told you to KNOW the purpose of each type of wave....

Multiple Choice

Which type of waves are used for television?

• radio

• visible

• gamma

• x-rays

Multiple Choice

The color with the longest wavelength will have what type of frequency?

• higher

• lower

Multiple Choice

Which type of waves are often seen/experienced as heat?

• ultraviolet

• infrared

• radio

• gamma

Multiple Choice

Which type of waves are utilized to sterilize objects including medical equipment?

• gamma

• x-rays

• ultraviolet

• radio

Multiple Choice

What type of waves are used to penetrate solids (like your skin) to see within something and are used in doctor's offices and at airports?

• gamma rays

• infrared rays

• waves

• xrays

Multiple Choice

The color with the shortest wavelength will have what kind of frequency?

• higher

• lower

Poll

Do you now know how to differentiate (tell the difference between) the waves in the electromagnetic spectrum?

• Yes

• No

• Kinda

​That's all for today. We will pick up tomorrow.