1. Slide
60 seconds
Waves and the Electromagnetic Spectrum
Waves are disturbances that travel through space and transfer energy from one place to another. The electromagnetic spectrum is the range of frequencies of electromagnetic radiation. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
2. Open question
180 seconds
Does the increased use of electromagnetic radiation from cell phones, Wi-Fi, and other technology have a negative effect on our physical and mental health?
3. Slide
60 seconds
waves properties
Wavelength: the distance between two successive crests or troughs of a wave.
Amplitude: the maximum displacement of a wave from its equilibrium position.
Frequency: the number of waves passing a certain point in a certain amount of time.
4. Poll
60 seconds
Which of the following is NOT a property of waves?
- Frequency
- Weight
- Amplitude
5. Poll
60 seconds
What is the distance between two consecutive crests or troughs in a wave called?
- Wavelength
- Velocity
- Period
6. Word cloud
60 seconds
Wordcloud activity - What are some of the uses for EM radiation?
7. Poll
60 seconds
What is the order of the electromagnetic spectrum from shortest to longest wavelength?
- Radio waves, microwaves, infrared, visible light, ultraviolet,X-rays,gamma rays
- Visible light,infrared,X-rays,radiowaves,microwaves,gammarays
- Gamma rays, X-rays, ultraviolet, visible light, infrared, microwaves, radio waves
8. Poll
60 seconds
Which color of visible light has the longest wavelength?
- Red
- Violet
- Blue
- Green
9. Poll
60 seconds
What happens when white light passes through a prism?
- It becomes invisible
- It separates into different colors of visible light (rainbow)
- It remains white
- It turns black
10. Personalised Feedback
360 seconds
How do different types of waves in the electromagnetic spectrum, such as visible light, radio waves, and X-rays, differ from each other in terms of their properties and uses?
11. Poll
60 seconds
Which type of wave does not require a medium to travel through?
- Water wave
- Sound wave
- Electromagnetic wave
12. Poll
60 seconds
Which of the following is NOT part of the electromagnetic spectrum?
- X-rays
- Sound waves
- Radio waves
13. Poll
60 seconds
Which color has the highest frequency in the visible light spectrum?
- Red
- Green
- Violet
14. Slide
60 seconds
What is a Blackbody Radiator?
A blackbody radiator is an idealized physical body that absorbs all incident electromagnetic radiation. It's useful for estimating the temperature of objects in space that don't emit visible light. It also serves as a theoretical model for real objects that absorb and emit radiation at all wavelengths.
15. Word cloud
60 seconds
What is an example of a blackbody?
16. Slide
60 seconds
Did you know?
Blackbody radiation is responsible for the blue color of the sky during the day! The color of the blackbody radiator can change depending on the temperature of the object! Blackbody radiation is not only emitted by black objects, but any opaque object!
17. Poll
60 seconds
What is a blackbody radiator?
- An object that reflects all incident radiation
- An object that absorbs all incident radiation
- An object that emits all incident radiation
18. Poll
60 seconds
Which color represents the hottest temperature emitted by a black body
- Yellow
- Green
- Red
- Blue
19. Poll
30 seconds
How confident are you with the EM Spectrum lesson?
- Very confident 💪
- Mostly confident 😌
- Somewhat confident 🤔
- Not very confident 😕
- Not at all confident 🙁
20. Drawings
870 seconds
Clues
In pairs: Select one task
Question: Where can you find sources of electromagnetic radiation in everyday life and why are they dangerous?
Electromagnetic radiation is a type of energy that is emitted from certain objects or substances. It is invisible to the human eye, but it can be detected using special instruments. It can be found in everyday items like cell phones, microwaves, and television sets.
A: Work in pairs to research and create a diagram identifying the sources of electromagnetic radiation and the potential risks associated with each. B: Explain in a drawing how electromagnetic radiation travels and how it can affect our health.
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