Answer:
t = 1.6667 10⁻⁷ m
Explanation:
When light falls on a thin film on the surface we have two phenomena
- a change in phase when the beam passes to a medium with a higher index
- on the other hand, in the wavelength, due to the refractive index of the medium
λ = λ₀ / n
The second ray reflected from the other surface has no phase change
So the path difference between the two rays for destructive interference is
2t = m λ₀ / n
t = m λ₀ / 2n
Let's calculate
t = 1 500 10⁻⁹ / 2 1.50
t = 166.67 10⁻⁹ m
t = 1.6667 10⁻⁷ m
Answer:
Explanation:
hope this helps!!!!!!!!!!
In phase for constructive interference and out of phase for destructive
There it is written that doubly charged helium particles<span> {</span>alpha particles}<span> were projected onto very thin gold foil. Most of the </span>alpha particles<span> passed straight through, but some of the </span>alpha particles bounced back<span> because positive </span>particles {<span>protons} in the nucleus repelled them.</span>
Vector quantity is defined by direction as well as magnitude both
so now lets discuss all option
1) distance = it is total path length between two points so there is no direction needed in it so it is scalar
2) Speed = it is ratio of total distance covered and total time, so it also do not require any direction.
<em>3)velocity = it is ratio of displacement and time, and displacement is always given with direction so velocity is a vector quantity</em>
4) time = time is the measurement of the interval of two events and we do not require any direction in it so its a scalar quantity.
