Elements Of Remote Sensing
The value of energy quantum for radiation of any frequency is proportional to:

The square root of the frequency
The square of the frequency
The frequency
The reciprocal of the energy

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Elements Of Remote Sensing
Earth observations from a satellite platform provide:

All of these
Repetitive observations of the same area with intervals of a few minutes to a few weeks
Constant solar zenith angles and similar illumination conditions
Synoptic view of a large area

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Elements Of Remote Sensing
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,

Increases the contrast of the image but reduces the sharpness
Reduces the contrast but increases the sharpness
Reduces the contrast of the image and also its sharpness
Increases both the contrast and sharpness

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