No links please answer correctly. A board measurements 213 inches. How many feet is this?
2 answers:
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Answer:
The move from Level n=3 to Level n=2 has the long wavelength.
Explanation:
First, due to the selection rules, only transitions between adjacent levels are allowed, thus, only a transition between Level n=3 to Level n=2 or Level n=5 to Level n=4 are allowed. The two first options are wrong.
Second, analyzing the transition between Level n=3 to Level n=2 and the transition between Level n=5 to Level n=4 it is necessary to think in terms of the equation of the difference of energy for these type of transitions:
Δ (1)
The difference in energy (ΔE) is directly proportional to the quadratic difference between the 'n' levels of transition. Therefore, If the transition occurs between smaller 'n' levels the difference of energy will be smaller too.
Also, the energy (ΔE) is inversely proportional to the wavelength (λ) so a smaller energy means a larger wavelength.
ΔE = c / λ (2)
Hence, the move from Level n=3 to Level n=2 has a long wavelength.
In order to calculate this wavelength is necessary to replace the data on equation (1) and (2).
Answer:
Mars is about 224.4 million kilometers from the Sun.
Explanation:
This statement is incorrect. The correct one is presented below:
<em>Mars is 1.5 AU from the Sun. About how many kilometers is Mars from the Sun?</em>
The Astronomical Unit (AU) is a length unit used in Astronomy to measure distances between planets of the Solar System and from the Sun whose units equals to . Since Mars is 1.5 AU from the Sun, we converting this value into kilometers by means of the following simple rule of three:
Mars is about 224.4 million kilometers from the Sun.