Answer:
Δβ = 28.2 dB
Explanation:
Attached is the explanation
Answer:
wavelength is 1301.8 nm
Explanation:
Given data
energy levels n = 3 to n = 5
to find out
What is the wavelength
solution
we know wavelength formula that is given below
1/wavelength = RH(1/n1² - 1/n2²)
here we know RH value is 10973731.6 m^(-1)
so
wavelength = 1 / RH(1/n1² - 1/n2²)
wavelength = 1 / 10973731.6 (1/3² - 1/5²)
wavelength = 1.3018 ×10^-6 m
wavelength is 1301.8 nm
Answer:
best explanation of this is sentence B
Explanation:
The radiation emission of the bodies is given by the expression
P = σ A e T⁴
Where P is the power emitted in watts, σ is the Stefan-Boltzmann constant, A is the surface area of the body, e is the emissivity for black body e = 1 and T is the absolute body temperature in degrees Kelvin.
When the values are substituted the power is quite high 2.5 KW, but the medium surrounding the box also emits radiation
T box ≈ T room
P box ≈ P room
As the two powers are similar and the box can absorbed, since it has the ability to emit and absorb radiation, as the medium is also close of the temperature of the box, the amount emitted is very similar to that absorbed, so the net change in energy is very small.
In the case that the box is much hotter or colder than the surrounding medium if there is a significant net transfer.
Consequently, the best explanation of this is sentence B