Complete Question
A grating has 767 lines per centimetre.Find the angles of the first three principal maxima above the central fringe when this grating is illuminated with 672 nm light.
Answer:
The first is
The second is
The third is
Explanation:
From the question we are told that
The number of lines per cm is
The wavelength is
Generally the condition for constructive interference is
Here d is the distance of separation of the slit which is mathematically represented as
So
For the first angle n = 1
So
For the second angle n = 2
So
For the second angle n = 3
So
Answer:
B. Momentum
Explanation:
There is a correlation between Momentum and Kinetic Energy. Both are variables that depend to some extent on speed and mass. Therefore, if a body has a certain speed, it will have a momentum and a kinetic energy.
If you write down the formulas for kinetic energy
and momentum
You can write the energy in terms of momentum
Despite this, there is an important difference: the moment is a vector quantity: it has a direction in space, these moments have the same ability to 'add up' in direction and magnitude as the vectors of forces for example. On the other hand, kinetic energy is a scalar quantity, which implies that it has no direction in space.
Answer:
392°F
Explanation:
200°C × 9/5) + 32 = 392°F