Not all stars emit energy as visible light. Some stars emit energy at

Question

Not all stars emit energy as visible light. Some stars emit energy at high frequencies outside the realm of visible light, such as gamma rays. Other stars, particularly in the Milky Way galaxy, will emit energy in the form of invisible X-rays.

If the statements above are true, which of the following conclusions is best supported?

A. A thorough analysis of visible light emissions is insufficient to monitor star energy emissions.
B. Gamma rays are also a common type of energy emission in the Milky Way galaxy.
C. X-rays emissions found outside the Milky Way galaxy are always paired with visible light emissions from the same star.
D. Dying stars are more likely to emit gamma rays.
E. Telescopes capable of observing gamma rays are incapable of observing visible light frequencies.

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GMATking94 · Answer

Hi  Bunuel

again a great question.

"The question says what can be concluded"
Options (C), (D) & (E) are clearly Out of Scope

Option (B) looks close but wait read the Q statement. "Some stars emit energy at high frequencies outside the realm of visible light, such as gamma rays.   Other stars, particularly in the Milky Way galaxy  , will emit energy in the form of invisible X-rays." So MW stars generally do not emit gamma radiations. Hence (B) is out.

Option (A) is the best answer.

$!vakumar.m · Answer

Not all stars emit energy as visible light. Some stars emit energy at high frequencies outside the realm of visible light, such as gamma rays. Other stars, particularly in the Milky Way galaxy, will emit energy in the form of invisible X-rays.

If the statements above are true, which of the following  conclusions is best supported ?

A. A thorough analysis of visible light emissions is insufficient to monitor star energy emissions.
Correct. Evidence/Support are - 'some stars emit ... outside the realm of visible light' and 'other star, emit .. invisible X-rays'. Since, the stars emit energy in a wide range of frequencies outside the visible range, so the conclusion that Option A states is valid.

B. Gamma rays are also a common type of energy emission in the Milky Way galaxy.
It is mentioned that other stars, particularly in the Milky Way galaxy, will emit energy in the form of invisible X-rays. But no support exists for Option B as conclusion. Incorrect.

C. X-rays emissions found outside the Milky Way galaxy are always paired with visible light emissions from the same star.
Incorrect. No such support exists for Option C.

D. Dying stars are more likely to emit gamma rays.
Incorrect. No such support exists for Option D.

E. Telescopes capable of observing gamma rays are incapable of observing visible light frequencies.
Incorrect. No such support exists for Option E.

Answer A

Not all stars emit energy as visible light. Some stars emit energy at

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Not all stars emit energy as visible light. Some stars emit energy at

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