The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called________________?

Related Mcqs:

1. The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared______________?

   A. Visible (0.4 –
   B. Near-IR (0.7 –
   C. Short wave-IR (1.3 –
   D. None of these

2. According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?

   A. The angle of incidence is equal to the angle of refraction
   B. The angle of refraction r) is given by sin i
   C. Both A. and B.
   D. Neither A. nor B.

3. “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as___________________?

   A. Fresnel reflection
   B. Fresnel refraction
   C. Snell’s law
   D. None of these

4. 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

5. The value of energy quantum for radiation of any frequency is proportional to________________?

   A. The frequency
   B. The reciprocal of the energy
   C. The square of the frequency
   D. The square root of the frequency

6. The optical property of a water body depends on ?

   A. Absorption by the dissolved material
   B. Absorption by the suspended particulate matter
   C. Scattering by the suspended particulate matter
   D. All of these

7. Which one of the following parameters is considered to determine the reflectance of a vegetation canopy ?

   A. Solar zenith angle
   B. Azimuth angle
   C. Look angle
   D. All of these

8. The changes in the reflectivity/emissivity with time, is called ?

   A. Spectral variation
   B. Spatial variation
   C. Temporal variation
   D. None of these

9. Pick up the correct statement from the following ?

   A. The refractive index of a medium varies according to the wavelength of the radiation,
   B. The variation of the refractive index with wave length, is called dispersion,
   C. The splitting of colours of white light by passing through a prism is caused due to dispersion
   D. All of these

10. Which one of the following frequency regions is a part of sun’s radiation ?

    A. Ultraviolet frequency region
    B. Infrared frequency region
    C. Radio frequency region
    D. All of these