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Activity #5 2 Wavelength = Wavelength (K) = Frequency (f) = Hz (Hz is the number of wavelengths passing a point in 1 second.) 1531;} You know the frequency is 2450 MHz. You need to translate this to scientific notation. [Round to 2 decimals] Velocity (v) = m/s [Use scientific notation here. Round to 2 decimals] air" This is the speed of the microwaves which is also the speed of light. The official speed of light is given as 299792458 X 108 m/s. What percent of the actual speed is your "marshmallow calculated" speed? Vmarshmallow / 299792458 X 108 X 100 = ——__% [Round to 1 decimal] ":7 b How does the door on a microwave oven allow us to see inside while keeping microwave radiation contained? [39"] The solid walls of the microwave oven keep the microwave radiation from escaping the oven's interior. But the door to these ovens has a glass window that we can see through. If you look closely at the door, you will see a metal grid sandwiched between the glass panes of the window. How and why does the metal grid in the door of a microwave oven protect us from the microwave radiation released inside of the oven that cooks our food? To answer this question, you need to compare the wavelength of the microwave radiation and the wavelength of visible light. Use the wavelength for the microwave radiation you calculated above. For visible light, use 500 nanometers. The openings in the metal grid found in microwave oven doors are about 1 mm in diameter. Note that these sizes need to be converted to a standard lengthimeters. Size of grid opening: 1 mm = m (Write this number using scientific notation.) "if: Xmicmwave = m [Calculated above in meters; use scientific notation. Round to 1 decimal] E " '_;;r Mums = 500 mm = In [Use scientific notation] #- The wavelength of visible light is how many times smaller than the 1 mm grid openings? [Give your answer as a "regular" number] The wavelength of the microwave radiation is how many times larger than the 1 mm opening?

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This question was created from Wk5,6_Assignment 5--Microwave Ovens _ Speed of Light

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