Related Questions

Electromagnetic radiation:
A Produces a time varying magnetic field and vice versa
B Once generated, remains self-propagating
C Is capable to travel across space
D All of these
Which one of the following statement is incorrect regarding the electromagnetic radiation?
A These are produced by the motion of electric charge
B The oscillation of charged particles sets up changing electric fields
C The changing electric fields induce the changing magnetic fields in the surrounding medium
D None of these
The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:
A Passive remote sensing
B Active remote sensing
C Neutral remote sensing
D None of these
Critical angle of electromagnetic radiation takes place if
A Angle of incidence is equal to angle of refraction
B Angle of incidence is greater than the angle of refraction
C Angle of incidence is equal to 90°
D Angle of refraction is equal to 90°
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:
A Sensors
B Passive sensors
C Active sensors
D None of these
The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:
A Ozone hole
B Atmospheric window
C Ozone window
D Black hole
Which electromagnetic radiation is used for satellite communication ?
A Ultraviolet
B Infrared
C Radiowave
D Millimeter wave
The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.
A 0.38-0.78
B 0.5-50
C 100-1000
D 5-50
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
A Reduces the contrast of the image and also its sharpness
B Increases the contrast of the image but reduces the sharpness
C Increases both the contrast and sharpness
D Reduces the contrast but increases the sharpness
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
A Global warming
B Green house
C Atmospheric effect
D Ionosphere

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