In the context of blackbody radiation, which of the following statements is true of stars?
A) Temperatures of stars cannot be estimated from their color.
B) Red stars are cool, and blue stars are hot.
C) Red stars are hot, and blue stars are cool.
D) Star temperatures cannot be measured using the relative strengths of various spectral lines.
B
You might also like to view...
Venus's extremely high surface temperatures are due to
A. a recent impact that heated the planet. B. the composition of its atmosphere. C. volcanic activity. D. its relatively close proximity to the Sun.
A definite method for losing weight is
A) exercise. B) reduce Calorie intake. C) maintain a low body temperature. D) none of the above
Suppose you want to know the chemical composition of a distant star. Which piece of information is most useful to you?
A) The peak energy of the star's thermal radiation. B) The Doppler shift of the star's spectrum. C) The wavelengths of spectral lines in the star's spectrum. D) Whether the star's spectrum has more emission lines or more absorption lines.
I wish to use a positively charged rod to charge a ball by induction. Which statement is correct?
a. The charge on the ball will be positive. b. The ball must be a conductor. c. The ball must be an insulator that is connected temporarily to the ground. d. The ball is charged as the area of contact between the two increases.