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17jhester1
22.06.2019 •
Physics
What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th
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Ответ:
2as = v² - u²
a = -(18)²/(2 x 265)
a = 0.61 m/s² upwards
Resultant force = mass x acceleration
Resultant force = upwards thrust - weight
1.14 x 10⁴ x 0.61 = Thrust - 1.14 x 10⁴ x 1.6
Thrust = 2.52 x 10⁴ Newtons