guys l have a one question .... agar koi insane Safi ap Kai samani bolo kii vo ap ko parayrr Kar thak haii aur family Kai samanai nahii to kya vo sachiiii haiii hmmm....
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sab jhut hai me hi karab hu sab mera hi galti hai
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The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. The word telescope now refers to a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors.
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