Question

The ultraviolet light that causes suntans (and sunburns!) has a typical wavelength of 300 nm What is the frequency of these rays? What is the fundamental frequency for a 58 cm banjo string if the speed of waves on the string 460 m/s? A tuning fork has been damaged and its frequency slightly changed. What could its altered frequency be if it produces two beats per second with a tuning fork that is known to vibrate at 424 Hz? You have a tuning fork of unknown frequency. When you ring it alongside a tuning fork with known frequency of 360 Hz, you hear beats at a frequency of 1O Hz. When you ring it alongside a tuning fork with known frequency of 347Hz, you hear beats at a frequency of 3 Hz. What is the unknown frequency? How big is the normal audible range for humans? almost 200 hertz almost 200,000 hertz almost 2,000 hertz almost 2,000,000 hertz almost 20,000 hertz

Answer 1

8)

Frequency, f = c/lambda

Frequency, f = (3 x 10^8)/(300 x 10^-9)

Frequency, f = 1 x 10^15 Hz

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