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Which of the following are true regarding ionosphere?,I. It is the uppermost layer of atmosphere,II. The molecules and atoms of nitrogen and oxygen in this layer absorb a part of solar radiation and become ionized,III. This layer is responsible for reflecting back the radio wave transmitted from the earth

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Which of the following are true regarding ionosphere?,I. It is the uppermost layer of atmosphere,II. The molecules and atoms of nitrogen and oxygen in this layer absorb a part of solar radiation and become ionized,III. This layer is responsible for reflecting back the radio wave transmitted from the earth






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