Answer:
The frequency of this photon is 
(D) is correct option.
Explanation:
Given that,
Excited states,
We need to calculate the wavelength
Using formula for energy
We need to calculate the frequency
Using formula of frequency
Where, E =energy
Hence, The frequency of this photon is
Answer:
an electron with element with large number of valence electron and large atomic <u>radius</u>
Pegasus<span>, considering the fact that </span>unicorns<span> were, and still are, real. </span>
The answer to your question is D.
I assume you are talking about the space-time singularity.
Yes, the gravitational singularity is absurd since the gravitational field is infinite so that the celestial body does NOT depend on the coordinates anymore, i.e. the normal space-time theorem does NOT apply anymore.
However, this can be predicted by general relativity, where the singularity can appear at the center of the black hole.
So if you are talking about classical physics, yes it's difficult. But if you are talking about modern physics, then it's predictable and analyzible.
