In our everyday environment, diffraction is much more evident for sound waves than for light waves. why is this so?

Answer with explanation:

We know that diffraction of waves  is the phenomenon of bending of waves around a corner or an obstacle which it may encounter in it's path.

Any wave diffracts around an object only if the size of the object is comparable to the wavelength of the wave.

As we know that the wavelength of sound waves are generally in the order of meters(17 mm-17 m) which is highly large than the wavelength of light waves whose wavelength is in the order of manometers(500 manometers) thus the diffraction effects of sound waves are much more evident as compared to the diffraction produced by light waves as the objects that we encounter in our daily lives have sizes comparable to the wavelength of sound thus the effects are much more evident.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.