Light incident on a thin film is reflected and transmitted at each surface. Why does a thin film have to be "thin" for an interference pattern to form?

a. Light would not penetrate a thick film.
b. The surfaces of the film must be as close to perfectly parallel as possible. Irregularities would be magnified in a thick film.
c. The thickness of the film must be less than the wavelength of light.
d. Light is not slowed down when it enters into a thin film.
e. Light speeds up as it enters a thin film.


b

Physics & Space Science

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Fill in the blank(s) with correct word

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If each copper atom in a wire were to contribute two conduction electrons instead of just one, its conductivity would

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