1. What is the frequency of light waves with wavelength of 5 X 10'm?
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2. Find the frequency of electromagnetic wave in a vacuum with a wavelength of 0.02 m.
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3. If a dog whistle has a frequency of 30 000Hz and the approximated speed of sound is 340 m/s, what is the wavelength of the sound emitted?
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4. Visible red light has a wavelength of 6.85 m, calculate the frequency of the ligtht
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