When white light shines a thin film of soap, light : 813250
When white light shines on a thin film of soap, light is reflected from the back surface of the film only. both the front and back surfaces of the film. the front surface of the film only. This results in refraction of the reflected light rays. interference between the reflected light rays. a Doppler shift in the frequency of the reflected light. Colors are seen in the soap film because certain wavelengths of the reflected light refracted at different angles. canceled due to destructive interference. absorbed by pigments in the soap.