UCE1422_Unit I_EMR_Pop-quiz

Passive remote sensing uses ________.

• Sun as the source of energy

• Flash light as a source of energy

• Sensor’s own source of energy

• Microwave radio signal transmitter

A hypothetical, ideal radiator that absorbs and re-emits the entire energy incident upon it is a ________.

• Photon

• Quantum

• Ozone

• Blackbody

Which portion of the EMR can penetrate rain, fog and clouds?

• Ultraviolet rays

• Infrared rays

• Microwave rays

• Gamma rays

Which region of the EMR cannot be used for Remote Sensing?

• Infrared rays

• Gamma rays

• Visible light

• Microwave rays

The spectral region of the electromagnetic radiation which passes through the atmosphere without much reduction is known as ________.

• Ozone window

• Black hole

• Atmospheric window

• Scatter porthole

What is the type of scattering, when the interacting atmospheric particle’s size is much larger than the wavelength of EMR?

• Selective scattering

• Mie scattering

• Non-selective scattering

• Rayleigh's scattering

Which one of the following helps to identify objects on the earth’s surface?

• Scattering

• Radiometric error

• Absorption

• Spectral signature

Vegetation with more chlorophyll will reflect more ________.

• Ultraviolet energy

• Infrared energy

• Microwave energy

• Visible energy

Which statement obeys the Stefan-Boltzman law?

• M = σ/T⁴

• M = σT²

• M = σ/T²

• M = σT⁴

Roughness of the surface < incident wavelength. Which statement is true?

• Reflection will be near-diffuse

• Reflection will be diffuse

• Type of reflection is not dependent on roughness

• Reflection will be specular