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For example, too much UV directly from the Sun or from a sunbed can cause sunburn and skin cancer. UV waves carry more energy than visible light waves.Ultraviolet waves are harmful to your skin. UV wavelengths are smaller than visible light wavelengths.
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2 a Ultraviolet waves are harmful to human eyes and can cause blindness. These may include aluminium, copper, lead-tin alloy and plastic. To get an accurate measure of the dose received, the badge contains different materials that the radiation must penetrate to reach the film. The more radiation this absorbs, the darker it becomes when it is developed. c There is a light-proof packet of photographic film inside the badge.
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These kinds of application are usually possible because the more dense a substance is, the more X-rays it absorbs from an X-ray beam passing through it. P13.4 Ultraviolet waves X-rays, and gamma rays AQA GCSE Physics P13 Electromagnetic Waves Kerboodle Answers Page No : 197 1 a X-rays are often used to detect internal cracks in metal objects. b Radio waves of wavelengths greater than 100 mare used by national and international radio stations because they have a much longer range than shorter-wavelength radio waves. So because of their longer wavelength and shortest frequency are used for terrestrial tv.Ĥ a Wavelength = 3*10 8/1.05*10 8 = 2.86m.
#PROPERTIES OF ELECTROMAGNETIC WAVES 9 1 TV#
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191 1 a Wavelength of radio waves is greater than visible light waves. P13.1 The electromagnetic spectrum AQA GCSE Physics P13 Electromagnetic Waves Kerboodle Answers: Page No.