PHY 1120 - Homework 7 Electromagnetic (EM) Waves 1. An EM Wave has a wavelength of 600 nm. What is its frequency? How would we classify it within the Electromagnetic spectrum (e.g, microwave? X-ray?). 2. a) What is the wavelength of a 32 GHz radar signal? b) What is the frequency of an x-ray with a wavelength of 2.1 nm? 3. Our nearest star, after the Sun, is 4.2 light years away. This means if takes 4.2 years for the light it emits to reach the Earth. How far away is this star in meters? Note: there are 3.156 x 107 seconds in one year. 4. What is the range of wavelengths for a) FM radio (88 MHz to 108 MHz) and b) AM radio (535 kHz to 1700 kHz)? 5. Estimate the wavelength for a 1.9 GHz cell phone transmitter