Answer:
λ = 5.2 x 10⁻⁷ m = 520 nm
Explanation:
From Young's Double Slit Experiment, we know the following formula for the distance between consecutive bright fringes:
Δx = λL/d
where,
Δx = fringe spacing = distance of 1st bright fringe from center = 0.00322 m
L = Distance between slits and screen = 3.1 m
d = Separation between slits = 0.0005 m
λ = wavelength of light = ?
Therefore,
0.00322 m = λ(3.1 m)/(0.0005 m)
λ = (0.00322 m)(0.0005 m)/(3.1 m)
<u>λ = 5.2 x 10⁻⁷ m = 520 nm</u>
Answer:
a) 3.00×10⁸ m/s
b) 2.9979×10⁸ m/s
c) 2.997925×10⁸ m/s
Explanation:
299792458 m/s is the speed of light
Let us write this in scientific notation first
2.99792458×10⁸ m/s
a) In three significant figures
We need to round the number to the hundredths place
3.00×10⁸ m/s
b) In five significant figures
We need to round the number to the ten thousandths place
2.9979×10⁸ m/s
c) In seven significant figures
We need to round the number to the millionths place
2.997925×10⁸ m/s
