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Statement (I): The regions of the electromagnetic spectrum in which the atmosphere is transparent are called atmospheric windows. Statement (II): The atmosphere is practically transparent in the visible region of the electromagnetic spectrum.

Statement (I): The regions of the electromagnetic spectrum in which the atmosphere is transparent are called atmospheric windows. Statement (II): The atmosphere is practically transparent in the visible region of the electromagnetic spectrum. Correct Answer Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)

In particular, the molecules of water, carbon dioxide, oxygen, and ozone in our atmosphere block solar radiation. The upper atmosphere blocks all of the gamma rays, x-rays and most ultra-violet light of EM spectrum, but visible light range of EM spectrum freely pass. Our eyes use this visible light to see features on Earth.

Therefore, the wavelength ranges in which the atmosphere is transparent or we can see feature on earth are called atmospheric windows. 

Remote sensing projects must be conducted in wavelengths that occur within atmospheric windows.

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