Loud cheering at a sporting event that travels hundreds of yards. Constructive interference of crest on crest and trough on trough. Diffraction of longer red wavelengths going around atmosperic particles and shorter blue wavelengths reflecting off atmospheric particles. Prism separating white light into colors. Different frequencies of light traveling at different speeds in a medium cause the different colors to take different paths through the prism.
Different frequencies have slightly different indexes of refraction.
Echo Sound reflects off the surface. Loudness is measured in decibels. A 1000 times louder sound will increase by 30 dB. 9 A train at rest emits a sound at a frequency of 1500 Hz. Solve the problems below for the observed frequency in the cases presented.