What types of objects in space emit x-rays? How are the x-rays detected?
Hot gases and objects having temperature above million degree K emit X rays.
Stars like Sun, galaxies, matter falling to black holes, etc. emit X rays.
Since our atmosphere is not transparent to X rays, we have to put space telescopes to find X ray sources above earth's atmosphere.
Special inclined mirror telescopes are used to detect X rays.
See attached drawing of a X ray telescope.
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Black holes, neutron stars, white dwarfs, supernova remnants, active galactic nuclei, and hot gas in galaxy clusters are just a few examples of the objects in space that emit X-rays. X-ray detectors are devices that convert incoming X-rays into visible light or electric signals, which are then processed to create images or spectra of the X-ray sources. X-ray detectors are typically mounted on satellites or high-altitude balloons.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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