21ST CENT.AST.W/WKBK+SMARTWORK >BI<
6th Edition
ISBN: 9780309341523
Author: Kay
Publisher: NORTON
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Question
Chapter 6, Problem 37QP
To determine
Size of image of moon in a telescope having focal length 13.8 mm to that in telescope of focal length of 250 meters.
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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 = I times
Large telescopes often have small fields of view, i.e. it can only see a very small corner of the sky. For example, the Hubble Space Telescope (HST) Advanced Camera has a field of view that is roughly square and about 0.055 degree on a side. Calculate the angular area of the HST's field of view in square degrees.
If a telescope has 2 converging lens, with an eyepiece that has a focal length of 3cm, and the object having a focal length of 90cm, what would be the total magnification that the telescope has?
Chapter 6 Solutions
21ST CENT.AST.W/WKBK+SMARTWORK >BI<
Ch. 6.1 - Prob. 6.1ACYUCh. 6.1 - Prob. 6.1BCYUCh. 6.2 - Prob. 6.2CYUCh. 6.3 - Prob. 6.3CYUCh. 6.4 - Prob. 6.4CYUCh. 6.5 - Prob. 6.5CYUCh. 6 - Prob. 1QPCh. 6 - Prob. 2QPCh. 6 - Prob. 3QPCh. 6 - Prob. 4QP
Ch. 6 - Prob. 5QPCh. 6 - Prob. 6QPCh. 6 - Prob. 7QPCh. 6 - Prob. 8QPCh. 6 - Prob. 9QPCh. 6 - Prob. 10QPCh. 6 - Prob. 11QPCh. 6 - Prob. 12QPCh. 6 - Prob. 13QPCh. 6 - Prob. 14QPCh. 6 - Prob. 15QPCh. 6 - Prob. 16QPCh. 6 - Prob. 17QPCh. 6 - Prob. 18QPCh. 6 - Prob. 19QPCh. 6 - Prob. 20QPCh. 6 - Prob. 21QPCh. 6 - Prob. 22QPCh. 6 - Prob. 23QPCh. 6 - Prob. 24QPCh. 6 - Prob. 25QPCh. 6 - Prob. 26QPCh. 6 - Prob. 27QPCh. 6 - Prob. 28QPCh. 6 - Prob. 29QPCh. 6 - Prob. 30QPCh. 6 - Prob. 31QPCh. 6 - Prob. 32QPCh. 6 - Prob. 33QPCh. 6 - Prob. 34QPCh. 6 - Prob. 35QPCh. 6 - Prob. 36QPCh. 6 - Prob. 37QPCh. 6 - Prob. 38QPCh. 6 - Prob. 39QPCh. 6 - Prob. 40QPCh. 6 - Prob. 41QPCh. 6 - Prob. 42QPCh. 6 - Prob. 43QPCh. 6 - Prob. 44QPCh. 6 - Prob. 45QP
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- Keck-I has a 10m diameter mirror. HST (Hubble Space Telescope) has a 2.4m mirror. What is the ratio of the light gathering power of Keck-I to the light-gathering power of HST? [Compute the ratio (light gathering power of Keck)/(light gathering power of HST) and express as a decimal. Do not use scientific notation when entering your answer. ] [Hint: model the telescope mirrors as circular disks with the indicated diameters. What property of the telescope mirror shape determines how much light it collects?] The question is number 5 and this is all the information I have.arrow_forwardAn object placed 10 cm from the lens projects a real image 52 cm behind the lens. What is the focal length of the lens (in meters)?arrow_forwardA lens, with a focal length of 2 centimeters, forms an image at -34 centimeters. How far (in centimeters) from the lens was the object placed? Round your final answer to two decimal places.arrow_forward
- When an object is placed 10 cm from a lens, the image created is upright and 2.1 times larger. Calculate the focal length of the lens. (Give your answer in centimeters but don't include the units.)arrow_forwardIn broad daylight, the size of your pupil is typically 3 mm. In dark situations, it expands to about 7 mm. How much more light can it gather?arrow_forwardA Keplerian telescope has an objective lens of diameter 12 cm and focal length +90 cm, and an eyepiece of focal length +8 mm. It is used to observe Jupiter which has a true diameter of 140 000 km and a distance of 750 million km from Earth. Calculate the apparent angular diameter of Jupiter as seen through the telescope; give your answer in degrees.arrow_forward
- the focal length of a lens in a box camera is 11mm. The fixed distance between the lens and the film (image) is 5mm. if the object is clearly focused on the film, how far must the object be from the lens?arrow_forwardDefine magnifying power of a telescope. Write its expression.A small telescope has an objective lens of focal length 150cm and an eye piece of focal length 5cm. If this telescope is used to view a 100m high tower 3km away, find the height of the final image when it is formed 25cm away from the eye piece.arrow_forwardA telescope has an objective lens having a focal length of 10 m and a diameter of 100 cm. What is the magnification provided by this telescope if its eyepiece has a focal length of 5 cm?arrow_forward
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