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

Choose the correct statement regarding a telescope being used to look at Venus. If the focal distance of the objective lens is lengthened, then its magnification decreases. The eyepiece lens forms a real image of Venus. The image of Venus formed by the objective lens is located inside its focal point. The converging objective lens forms a virtual image of Venus. The image formed by the objective lens should be located just outside the focal point of the eyepiece lens.

A converging lens with a focal length of +6.0 cm is placed 4.0 cm in front of a diverging lens with a focal length of -2.5 cm in the telephoto lens. Calculate the image of a faraway object

The diagram below represents a ray of monochromatic light ( = 5.09 E 14 Hz) passing from medium X (n = 1.6) into fused quartz (n = 1.45). Normal Medium X Fused quartz B Which path will the refracted ray follow in the quartz? O A O none of these Ос O D O B

Shoe 1# Average angle: 15.17 Shoe #2 Average angle: 19.33

You have enrolled in a scuba diving class and while swimming under water in a nearby lake you look up and note that the Sun appears to be at an angle of 28° from the vertical. At what angle above the horizon does the diving instructor standing on shore see the Sun?       (By the way I tried 38.6 and my teacher said it was wrong)

Let's say we're considering one particular telescope. If we want to see a bigger piece of the sky, what should we do?   a Point the telescope at a different part of the sky  b Use an eyepiece with a longer focal length c Use an eyepiece with a shorter focal length d Each particular telescope can only show one size of "piece of the sky"

Please no hand writing solution

A spherical (concave) glass surface has a ball diameter of 1.2 cm. Its secondary focal length is * -2 cm-1 cm-3 cm-4 cm

A binary star system has an angular separation between the two stars of 3.2 × 10-5 radians. If 2 = 6.6 x 10-7 m, what is the smallest aperture (diameter) telescope that may be used to resolve the two stars? Write your answer in cm.