Sketch a rainbow, preferably in color, otherwise indicate which colors are where. Doctors use ultrasound, sound waves with frequencies of a few million hertz, to follow the development of fetuses in their mother's womb. The two waves in the figure below are allowed to interfere with each other. Sketch what the resutant wave looks like. Indicate positions where the waves interfere constructively and destructively .
Light is shined through a slit on to a screen as shown in the figure below.
The dimension of the slit is comparable to the light's wavelength. Sketch what the light intensity pattern on the screen looks like. Sketch the intensity pattern for the case where the light is shined through two slits as shown below. The dimension of the slits and their separation distance are comparable to the light's wavelength.