Question

When light falls on a soap bubble or on the oily film spread on a water puddle, a spectrum of colors is observed. How is this spectrum of colors formed? 1) separation of white light by a prism 2) absorption of colors in a pigment present 3) constructive and destructive interference of light waves 4) reflection of light by soap bubble or oil film

Answer 1

Option 3) Constructive And destructive interference of light waves

Step-by-step explanation:

When the light is incident on a soap bubble of certain thickness it constructively interferes for wavefronts which are in phase to produce white light and when the wavefronts are out of phase, they undergo destructive interference to produce a series of colors. Thus, interference is the reason.