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A source of sound emits waves of frequency 500 Hz in air. The speed of sound in air is 340 m/s. (a) What is the wavelength of the sound wave? (b) How much time does the wave take to travel a distance of 170 m?
The wavelength of the light of red and blue colours are nearly 7.8×10⁻⁷ m and 4.8×10⁻⁷ m respectively. Which colour has greater speed in vacuum?
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