If the wavelength of visible light was around 10cm instead of 500nm and we could see it, what effect would this have on diffraction and interference? 24

 If the wavelength of visible light was around 10cm instead of 500nm and we could see it, what effect would this have on diffraction and interference?

24. How would figure 9.29 be different if the glass were replaced by water or by a
diamond?

38.) Indicate whether each of following is a real image or virtual image.
a. Image on the retina in a person's eye.
b. Image one sees in a rear view mirror.
c. Image one sees on a movie screen.
d. Image one sees through eye glasses or contact lenses.