On a cold day, the speed of sound in air is 330 m/s. a note with a frequency of 1,320 hz is played on an instrument. what is the wavelength of that sound wave? 0.25 m 4 m 1,650 m 435,600 m

 wavelength 0.25m

Solution:

We will be using the wave equation to determine the wavelength  

V= f (λ)

Speed = frequency. Wavelength  

Using this in the equation:

Speed = 330 m/s

Frequency= 1320 Hz

V= f (λ)

330 = (1320) (λ)

0.25m= λ

Note: Do not forget to mention the units (i.e. meters/m) or otherwise it may cost you marks! For frequency the unit is Hz and for speed (v) the unit is m/s (Meter/second)

 wavelength 0.25m

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

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