What is the time traveled by a pulse over a distance of lcm in air (n=1) and in 1cm of glass (n 1.5)? What is the difference in
1 answer:
You might be interested in
Answer:
v = 49.69 km/hr
Explanation:
velcoity of truck with respect to car is given as = velocity of truck - velocity of car
velcoity of truck with respect to car is given as = (-54 sin(28)i +54cos(28)j - 91km/h
= -24.35i - 43.32j
magnitude of velocity is
v = 49.69 km/hr
the direction is
= 60.65 degree towrd south of west
Answer:
a) 9.0
Explanation:
The force between two point charges, obeys Coulomb's Law, which can be written as follows:
As it can be seen, if the separation between the charges remains the same, the new value of the force will be directly proportional to the product of the charges.
If both charges are tripled, the mutual force between them will be changed in a factor equal to 3.0*3.0 = 9.0
Answer:
(a) 1.2703×10⁻⁷ m
(b) 4.7636×10⁻⁸ m
(c) 2.5406×10⁻⁸ m
Explanation:
Given:
Width of the infinite well, L = 340 pm = 340×10⁻¹² m.
The formula for energy of the electron in nth state is:
The expression for the difference in energy between the levels having quantum numbers n(initial) to n(final) is:
According to Planks theory:
E = hv
where, v is the frequency
Also,
Frequency×Wavelength = Speed of light
So,
Also, using energy from above formula as:
For longest wavelength ni = 1 and nf = 2
m= mass of the electron = 9.1 ×10⁻³¹kg
c = 3×10⁸m/s
h = 6.625×10⁻³⁴J.sec
<u>Longest wavelength = 1.2703×10⁻⁷ m</u>
For second longest wavelength ni = 1 and nf = 3
<u>Second longest wavelength = 4.7636×10⁻⁸ m</u>
For third longest wavelength ni = 1 and nf = 4
<u>Third longest wavelength = 2.5406×10⁻⁸ m</u>