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Types of Electromagnetic Waves OALH

Last updated almost 5 years ago
30 questions
Do Now
1

Draw a transverse wave with a high frequency.

1

Draw a transverse wave with a low frequency.

1

State the formula for calculating wave speed

1

State the equipment needed for measuring the speed of a water wave.

1

Calculate the gravitational potential energy of a 50 kg box held 15 metres above the Earth, which has a gravitational field strength of 9.8 N/kg.

1

Calculate the frequency of a wave which is travelling at 12m/s with 1.5m between each crest.

1

Explain why these statements are wrong:
•Matter moves with waves.
•Amplitude and frequency are related.
•Waves eventually just die out.

Checking for Understanding
1

Name the wave found between microwaves and visible light on the electromagnetic spectrum

1

Name the wave found between ultraviolet and gamma rays on the electromagnetic spectrum

1

Which electromagnetic spectrum wave has the highest frequency?

1

Which electromagnetic spectrum wave has the longest wavelength?

Key Knowledge
1

Define spectrum.

1

State the seven types of electromagnetic radiation in order from longest wavelength to shortest wavelength.

1

State the speed of electromagnetic waves in a vacuum.

1

Define spectrum.

1

State the seven types of electromagnetic radiation in order from longest wavelength to shortest wavelength.

1

State the speed of electromagnetic waves in a vacuum.

Recall Quiz
1

1. Which of the following types of electromagnetic radiation has the lowest frequency?

1

2. Which of the following types of electromagnetic radiation transfers the most energy?

1

3. Which of the following types of electromagnetic radiation has the highest wavelength?

1

4. Which of the following is NOT the speed of light in a vacuum?

Application Task - Please assume that, unless a speed is stated in the question, all electromagnetic waves have a velocity of 3 x108 m/s in air or a vacuum.
1

We do: Radio waves have very long wavelengths, some as long as thousands of km. Like all electromagnetic radiation, radiowaves travel through the air at 300 000 000 m/s.

Calculate the frequency of a radio waves with a wavelength of 600 m. Give your answer in Hz and kHz

1

1. a. Choose wavelengths from the list below to match the type of radiation.
3 x10–8 m Radio waves
1 x10–11 m Ultraviolet
5 x10–7 m X-rays
1500 m Visible Light

1

2. Electromagnetic waves travel through space at a speed of 3.0 x108 m/s.
The radio waves emitted from a distant galaxy have a wavelength of 25 metres.

Calculate the frequency of the radio waves emitted from the galaxy and give the unit.

1

3. Light waves with a frequency of 7.26 x1014 Hz lies in the violet region of the visible spectrum.
What is the wavelength of this frequency of light?

1

4. When an electron beam strikes a block of copper, X-rays of frequency 1.07 x1019 Hz are emitted.
What is the wavelength of these X-rays?

1

5. a. Calculate the wavelength of radiation emitted from radioactive cobalt with a frequency of 2.8 x1020 Hz.

1

b. What region would this wave lie in on the electromagnetic spectrum?

1

6. The wavelength of an argon laser output is 480 nm.
Calculate the frequency of the electromagnetic wave emitted. (2 marks)

Plenary
1

Write the seven types of electromagnetic radiation out in order from lowest frequency to highest frequency.