In order to effectively radiate a radio signal, an antenna must be at least one-

Question

In order to effectively radiate a radio signal, an antenna must be at least one-half the wavelength of transmission in length, i.e., minimum antenna height = 1 / 2 (lamda). What is the minimum height (m) of the antenna that WXYZ must have? WXYZ operates at a frequency of 1315. kHz. The speed of light, c, is 2.998 Times 108 m/s. What is the energy, in J/photon, of electromagnetic radiation that has a frequency of 8.57 x 101bHz ? Express your answer to 3 significant figures in scientific notation and do not include units.(4.45 Times 10-3 can be represented in scientific notation as 4.45E-3) *Submit each part separately to avoid losing your work* Calculate the energy (J) of the photon emitted when an electron in the hydrogen atom falls from n = 4 to n = 1 . Use 2.178 Times 10-18 J for the constant in the Bohr equation. Answer should be in scientific notation, e.g. 3000 = 3E3 Calculate the wavelength (m) of the light emitted during the transition from n=6 to n=2 . Hint, first calculate the energy as you did in the previous problem. Again, enter your answer in scientific notation.

Explanation / Answer

wavelength*frequency=speed

a)114 m

b)5.656E-18

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