The photographic equipment on a telescope is replaced by a CCD. If the photographic plate records 5 percent of the light reaching it, but the CCD records 90 percent, how much time will the new system take to collect as much information as the old detector recorded in a 1-hour exposure?
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- Astronauts observing from a space station need a telescope with a resolving power of 0.6 arc second at a wavelength of 530 nm and a magnifying power of 220. Design a telescope to meet their needs.What will its light-gathering power be, compared with a dark-adapted human eye? (Assume that the pupil of your eye can open to a diameter of about 0.8 cm in dark conditions.)(State the necessary primary diameter of the telescope, in m, and the ratio of the focal lengths below.)1 newton per meter square (Nm-2) is equal to ______________.Instead of a dot, sometimes the telescope image of a star looks like concentric rings. This is due to: a)diffraction. b)reflection. c)refraction. d)scatter.
- Which of these telescopes that detect visible and infrared light has the largest mirror, that is, the most "light gathering" capability? Hubble Space Telescope, now in low Earth orbit. The Vera Rubin telescope now under construction. in Chile. James Webb Space Telescope, to be launched by NASA and ESA this month. Palomar telescope, in California north of San Diego.It makes perfect sense to operate a house remote using infrared (IR) light waves rather than Bluetooth technology. Put up a compelling argument in support of your stance by presenting credible facts in its defense.Theoretically (that is, if seeing were not an issue), the resolution of a telescope is inversely proportional to its diameter. How much better is the resolution of the ALMA when operating at its longest baseline than the resolution of the Arecibo telescope?
- Compare the light-gathering power of a 10 m Keck telescope with that of a 0.9 m telescope.How is light and energy used in infrared spectroscopy (IR)?You want to create a telescope with a resolving powe of 0.100 arc seconds at a wavelength of 550 nm. Wha diameter (in m) do you need? If you want to increase the light gathering power by a factor of 10, by what factor does the diameter need to increase? What would the new resolving power be (in arc seconds)?