What is the smallest thickness of a soap film

Reference no: EM13265277

1. At what angle will 600nm light produce a second-order maximum when falling on a grating whose slits are 1.55×10?3cm apart?

? = ____ degree

2. What is the smallest thickness of a soap film (n=1.40) that would appear black if illuminated with 470nm light? Assume there is air on both sides of the soap film.

tmin = ____ meters

3. How thick (minimum) should the air layer be between two flat glass surfaces if the glass is to appear bright when 550nm light is incident normally?

tmin = ____ meters

What if the glass is to appear dark?

tmin = ____ meters

Reference no: EM13265277

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