Radio telescopes are much larger than optical telescopes because (Select All the answers that are correct)Group of answer choicescosmic radio sources are very weak relative to their optical counterpartscosmic radio sources are very strong relative to their optical counterpartsradio wavelengths are relatively smallradio wavelengths are relatively largelarger dishes are needed to improve the resolutionsmall dishes can achieve a high resolutionlarge radio dishes are need to improve the light gathering powerlarge radio dishes are need to improve the sound gathering power
Question
Radio telescopes are much larger than optical telescopes because (Select All the answers that are correct)Group of answer choicescosmic radio sources are very weak relative to their optical counterpartscosmic radio sources are very strong relative to their optical counterpartsradio wavelengths are relatively smallradio wavelengths are relatively largelarger dishes are needed to improve the resolutionsmall dishes can achieve a high resolutionlarge radio dishes are need to improve the light gathering powerlarge radio dishes are need to improve the sound gathering power
Solution
The correct answers are:
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Cosmic radio sources are very weak relative to their optical counterparts: This is true because radio signals from space are often very weak and require large dishes to collect enough of the signal to make a clear image or data set.
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Radio wavelengths are relatively large: This is also true. Radio waves have much longer wavelengths than light waves. Therefore, to accurately focus and collect these waves, a much larger dish is required.
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Larger dishes are needed to improve the resolution: This is true as well. The larger the dish, the better the resolution of the image or data collected. This is because a larger dish can collect more signal, which can be processed into a more detailed image or data set.
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Large radio dishes are needed to improve the light gathering power: This is not entirely accurate. While a larger dish does improve the ability to collect more signal, it's not light that's being collected, but radio waves. So, while the concept is correct, the terminology is not.
Similar Questions
What is the resolution of a telescope?Group of answer choicesits ability to distinguish two adjacent objects close together in the skyits ability to see very faint objectsits ability to make distant objects appear much closer to usits ability to focus more than just visible light for imagingits ability to separate light into its component colors for analysis
What advantage do reflector telescopes have over refractor telescopes in terms of aperture size?1Faster magnification2Higher portability3Smaller apertures4Larger apertures
The resolving power of a telescope can be increased by:
In astronomy, an interferometer can be used toGroup of answer choicesspeed up the processing of CCD imagesyield better seeing conditions with optical telescopesimprove the angular resolution of radio telescopesincrease the sensitivity of infrared telescopes to longer wavelengthsdecrease the effects of light pollution in getting darker sky backgrounds
Electron microscopes have a much higher resolution than either the human eye or conventional light microscope because: 1 pointOf the very short (nanometer) wavelengths of electronsOf their higher magnificationThe lenses used are of much higher qualityAll of the answers
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