Explanation:
Hints:
Use the formula below to find the period.
Where f is the frequency in Hertz, and T is the time period in seconds.
To calculate the wavelength
use:
frequency=speed×wavelength
use the speed of sound. Make wavelength the subject of the formula and solve
Answer:
so these are
either 3 to 2 or 2 to 1 or 3 to 1
Explanation:
As we know that total number photons emitted from nth state to ground state is given by
here it shows that if electron has transition from nth excited state to ground state then total number of photons is given by above equation
here we know that higher state is n = 3
so total number of photons is given as
so these are
either 3 to 2 or 2 to 1 or 3 to 1
Answer:
152.7 nm
Explanation:
Refractive index of glass plate = n = 1.64
Refractive index of oil = n' = 1.27
wavelength = λ = 501 nm = 501 e-9 m
2n t = m λ , since it undergoes constructive interference.
Thickness = t = 501 × 10⁻⁹ m / 2 (1.64)
= 152.7 nm
200 m to km = 0.2 km
200 m to cm = 20 000 cm
Have a nice day