A Kepler telescope has an objective lens of focal length 120 cm. It is used to observe a star cluster of true angular diameter 4 arcmin (where 60 arcmin = 1 degree); and it is desired that the apparent angular diameter of the star cluster when viewed through the telescope is 10 degrees. Calculate the required focal length of the eyepiece.

Q: he primary mirror of a telescope is 2.4 m in diameter. At what altitude will you need to pilot the…

A: The distance between two objects be defined as, Here, dθ be defined as the Rayleigh criterion.

Q: Two converging lenses with focal lengths of 20 cm and 24 cm are combined to make a single lens. What…

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Q: A Galilean telescope adjusted for a relaxed eye is 36.8 cm long. If the objective lens has a focal…

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A: Given Magnification m = + 9  Positive as it is used as magnifier. Image distance v = - 25 cm

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A: Given: The object distance is 30 cm. The focal length is 8.0 mm. The height of object is 2.4 cm.

Q: A refracting telescope has an angular magnification of -83.00. The length of the barrel is 1.500 m.…

A: Given :     Angular magnification, M = -83.00     Barrel length, L = 1.500 m We have,  Angular…

Q: Use the astronomical data provided in this text to compute the angular size of Jupiter as seen from…

A: Angular size θ'=fofeθ=fofe206265dRS arcseconds Here, d is the diameter of the Jupiter and RS is the…

Q: A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15…

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Q: An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at…

A: Given data: The length of tube is L=46.5 cm. The focal length of eyepiece is fe=1.7 cm.

Q: Problem 11:  A pair of binoculars has an angular magnification of -7.5, when acting as a telescope…

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Q: What CANOT be explained by ray optics? the resolution of telescope. image reversal in a mirror.…

A: Ray optics: Ray optics, also known as geometrical optics, is a branch of optics that studies the…