Elements Of Remote Sensing
Which one of the following statement is correct?

The rate of transfer of radiant energy is called flux and is expressed in watts
Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
All of these
The radiant energy which falls upon a surface is termed as irradiance

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Elements Of Remote Sensing
Geodimeter is based on:

The visible light as carrier with frequency of the order of 5 × 1014 Hz
High frequency radio waves
Propagation of infrared radiation
Propagation of modulated light waves

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