Angelica is an engineer who is designing a system of solar panels that will be placed on the roofs of houses in a new neighborhood. Which of the following factors are most important for her to take into account to ensure that her design is successful?
A.
the season in which the solar panels will be installed and the cost of the needed materials
B.
the time it will take to install the solar panels and how many cars will be parked at each house
C.
the width of the streets in the neighborhood and the time it will take to install the solar panels
D.
the cost of the needed materials and the area of each roof that is frequently exposed to sunlight
( 7th grade science)
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Ответ:
The last option is correct.
Explanation:
An emission spectrum is that obtained by passing a white light, such as that of the Sun, or of the flame of another element (oxygen, in this case), by a prism and a discontinuous spectrum is obtained. Absorption is when the continuous spectrum passes through another gas and causes the presence of dark lines.
In the case of the options provided, most likely the oxygen emission spectrum is that shown in the last option. This is because, the light pattern, shown in this option is what most resembles the light pattern of the oxygen absorption spectrum.