Complete the table to show one use and one harmful effect for each type of ele

 Complete the table to show one use and one harmful effect for each type of electromagnetic wave. Some of the answers have been completed for you.
(2)
Type of electromagnetic wave Use Harmful effect
Infrared Radiant heater Skin burns at high doses
Ultraviolet Damage to eyes
X-rays Imaging
 (c) A mobile phone transmits microwaves with a frequency of 1.8 × 109 Hz.  The microwaves travel in air with a speed of 3.0 × 108 m/s. wave speed = wavelength x frequency  Calculate the wavelength of the microwaves transmitted by the mobile phone.  Show your working. 
 

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