A mobile phone network uses microwaves to transmit signals between mobile phones and masts. The microwaves have a frequency of 1.5GHZ and travel at a speed of 300000000m/s. The maximum distance that a phone can be from a mast and still receive a signal is 35km. Use an equation to find the time it would take to send a message to a mast 35km away

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.