The spectral class of the star Enif is K2,while that of the Sun is G2.Which conclusion can be drawn about Enif from this information?
A) Enif is intrinsically fainter than the Sun.
B) Enif is intrinsically brighter than the Sun.
C) Enif is cooler than the Sun.
D) Enif is hotter than the Sun.

Question

Quizplus · Accepted Answer

The spectral class of a star indicates its surface temperature, with O being the hottest and M being the coolest. Therefore, since Enif has a lower spectral class than the Sun (K2 < G2), it means that Enif has a cooler surface temperature compared to the Sun. However, the question does not provide any information about the intrinsic brightness of the stars, so options A and B cannot be determined. Option D is also incorrect since Enif is cooler than the Sun, not hotter.

The Spectral Class of the Star Enif Is K2,while That