A charged-couple device (CCD) detector ismounted at the focus of an f/7 reflecting telescope with a D= 50 cm mirror. The CCD chip contains 1024×1024 pixels, with each square pixel being 10μm on a side. How many separate exposures would be required to cover the entire celestial sphere (4π steradians)?

A charged-couple device (CCD) detector ismounted at the focus of an f/7 reflecting telescope with a D= 50 cm mirror. The CCD chip contains 1024×1024 pixels, with each square pixel being 10μm on a side. How many separate exposures would be required to cover the entire celestial sphere (4π steradians)?

Similar questions

As magical as the world of Middle-Earth may be, it is still subject to the laws of nature. An individual Dwarf stands approximately 1.24 m tall and is approximately 702.3 km away from Barad-dûr, where the Eye of Sauron is perched. To what aperture must the Eye of Sauron’s rectangular pupil be opened in order to be able to resolve the head of the individual from the ground? (Ignore the width of the individual and assume an average wavelength of 580.0 nm.)
A certain telescope has a 10' × 10' field of view that is re- corded using a CCD chip having 2048 x 2048 pixels. What angle on the sky corresponds to 1 pixel? What would be the di- ameter of a typical seeing disk (1" radius), in pixels?
The focal length from a simple lens is 100 micrometers and the detector is at 500 micrometers. What is the magnification of the lens?
Please refer again to Figure 2. The incident ray is coming in from water (n=1.33) rather than air. And this time, theta = 52.2 degrees, y = 31.9 cm and h = 1.13 cm. What is x now? 33.6 cm 42.0 cm 12.6 cm 50.4 cm
Under ideal conditions and when Mars is closest, estimate the linear separation between two objects on Mars that can barely be resolved by (a) the naked eye and (b) the Hubble telescope (whose main mirror is 2.4 meters in diameter). (Hint: the answers are about 5000 km and 14 km)
What is a megapixel in a digital camera?(a) A large spot on the detector where the image isfocused.(b) A special kind of lens that gives a sharper image.(c) A number related to how many photographs thecamera can store.(d) A million light-sensitive spots on the detector.(e) A number related to how fast the camera can takepictures.
The diameter of the Arecibo radio telescope is 307 m. It can image radio source that emit electromagnetic waves with wavelength between 3 cm and 1 m. The Virgo Cluster is a cluster of galaxies whose center is ~53.8 Mly away from us. Assume the telescope is imaging at a wavelength of 63.3 cm and can just resolve two point sources of radio waves in the Virgo cluster. How close together could these point sources be, i.e. what is the minim distance between them in ly? Enter an integer.
What CANOT be explained by ray optics? the resolution of telescope. image reversal in a mirror. camera lens refraction. X the transmission of signals in fiber optic.