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White light is passed through a cold gas and then through a prism, as shown below - NSC Physical Sciences - Question 1 - 2022 - Paper 1
Question 1
White light is passed through a cold gas and then through a prism, as shown below. An image is observed on the screen. Which ONE of the following correctly describe... show full transcript
Worked Solution & Example Answer:White light is passed through a cold gas and then through a prism, as shown below - NSC Physical Sciences - Question 1 - 2022 - Paper 1
Step 1
Which ONE of the following correctly describes the ENERGY TRANSITION of the atoms of the gas and the TYPE OF LINE SPECTRUM observed on the screen?
Answer
The correct answer is A. The process involves an energy transition where atoms in the gas absorb energy, causing electrons to move from a lower energy level to a higher energy level. When these electrons return to their original state, they emit light, resulting in an emission line spectrum. Thus, the transition is from a higher to a lower energy level and corresponds to an emission spectrum.