What is spectral resolution? Why can a large telescope allow for a higher spectral resolution than a smaller telescope?
What will be an ideal response?
Spectral resolution is a measure of the amount of detail that can be seen in a spectrum (i.e., how well it can separate out two spectral features from each other). It depends on how widely the light from a telescope is spread out, but the trade-off is that the more the light is spread out, the dimmer it becomes until it becomes undetectable. Since a large telescope gathers more light than a smaller telescope, it can spread the light out further and achieve a higher resolution.
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First Law of Thermodynamics: A cyclic process is carried out on an ideal gas such that it returns to its initial state at the end of a cycle, as shown in the pV diagram in the figure. If the process is carried out in a clockwise sense around the enclosed area, as shown on the figure, then the change of internal energy over the full cycle
A. is positive. B. is negative. C. is zero. D. cannot be determined from the information given.
What is the change of entropy associated with 3.0 kg of water freezing to ice at 0.°C?
A) -1.1 kcal/K B) -0.88 kcal/K C) 0 kcal/K D) 1.0 kcal/K E) +0.88 kcal/K
The limiting level below which a stream cannot erode the land is called its
a. base level. b. ultimate level. c. bed level. d. erosion level.
The tip of the needle of a sewing machine executes simple harmonic motion with an amplitude of 1.2 cm and an angular frequency ? = 62 rad/s. What is the total distance traveled by the needle in 1.9 s?
A) 27 cm B) 40 cm C) 1.1 cm D) 90 cm E) 140 cm