In this unit we build on work we have done before on light .  We will consider the electromagnetic spectrum in terms of different regions related to wavelength and learn how to use the wave equation to link wavelength, frequency and energy carried by a wave.

Properties and uses of the regions of the electromagnetic spectrum will be considered and we will investigate the relationship between surface colour, temperature, and the rate of emission of infra-red radiation. You need to be able to describe the use of radio waves in communications for television and mobile phones along with outlining transmissions of signals through optical fibres. Higher tier students also need to understand the process of modulation of carrier waves to give a more complex picture of how information can be transmitted using waves.

Task 2c:  Make notes that:

• Define the electromagnetic spectrum.

• Name the different waves of the electromagnetic spectrum.

• Describe the properties of electromagnetic waves.

• Explain how the energy carried by an electromagnetic wave depends on its frequency. 

Task 3c: Make notes that:

• Describe the uses of infrared radiation.

• Explain how we use infrared radiation for heating, cooking and cameras.

• Write a method to investigate the effect of surface colour on IR emission.

Task 4c: Make notes that:

• Describe the uses of radio waves, microwaves and visible light. 

• Explain how we communicate using radio waves, microwaves and visible light.

Task 5b: Make notes that:

• Describe the uses of ultraviolet, x-rays and gamma rays.

• Describe how ultraviolet, x-rays and gamma rays can have a hazardous effect on human body tissue.

• Explain why ultraviolet,  x-rays and gamma rays are useful for medical imaging and treatments.

Task 5c: Complete and mark the exam question 

Task 7c: Complete and mark the exam question 

Task 6c: Make a mind map or single page revision summary of this topic

Complete the quiz for your set to check you understand this topic