In the dark, your pupil (the aperture of your eye) expands to a diameter of 7 mm. How many times more light can be gathered by a telescope with a 5.5 m diameter than by a fully dark- adapted eye? Increase in light gathered = Itimes

Astronomers who use ground-based telescopes spend a lot of time and effort dealing with something called seeing. Sometimes they build adaptive-optics systems to try and partially overcome it. What is seeing? Group of answer choices Stray light from buildings, cars, parking lots, streetlights, etc.., which makes the night sky brighter and thus makes it harder to see faint astronomical objects The inability of refracting telescopes to bring all colors of light to a focus at the same distance from the objective lens. Turbulence in the Earth's atmosphere that makes for blurry images of astronomical objects The ability of a spectrograph or spectrometer to spread light out into its constituent colors, thus revealing what a distant object is made of.

Which one of the following would you suggest to an astronomer to best resolve two closely spaced stars? Use a large objective lens and observe using blue light Use a large objective lens and observe using red light Use a small objective lens and observe using blue light Use a small objective lens and observe using red light

You observe two objects with the same telescope. The telescope is only able to gather visible light. The light you observe from object A has a longer wavelength than the light you observe from object B. Based on this information, which of the following statments MUST be true Light is being reflected from object A Light observed from object B is bluer Light observed from object A is redder Light is being reflected from object B Light is being scattered from object B

The diagram below represents a ray of monochromatic light (f=5.09 x 10^14 Hz) passing from medium X (n=1.46) into fused quartz (n=1.46). Medium X Fused quartz b A Which path will the ray follow in the quartz? n A B C Od D Normal B D

The primary mirror on a telescope has a 43m radius of curvature and the eyepiece has a focal length of 36 mm. Determine the maginification and length of the telescope (for length, treat telescope as a refracting telescope) M = ___ L =______

if the diameter of the field of view is 5.6 MM at 40 X what would the diameter be at 80 X

Bonnie's house is located at point K, which is 4.5 km north of Olivia's house, located at point S. A fire started at point F is observed from both houses. If angle FKS is 52-degrees and angle FSK is 28 degrees determine the distance from F to the nearest house. (show images and explanations, also include "law of sines")