Question

A film is said to be thin when its thickness is of the order of
incident light.
(a) time period (b) wavelength (c) angular frequency (d) velocity​

Answer 1

(b) wavelength

here is your answer

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Answer 2

Answer:

(b) wavelength

Explanation:

• Interference in thin films can be both beneficial and harmful. Constructive interference causes the intensity of light of a specific wavelength to increase. (It enhances the brightness of a specific colour, such as red, green, or blue.) Destructive interference reduces the intensity of light at a specific frequency.
• A film is said to be thin if its thickness is comparable with one wavelength of light.

Hence , correct option is (b)wavelength