“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___________________?

Related Mcqs:

1. 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.

2. If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by___________________?

   A. Cm = 1/
   B. Cm
   C. Cm
   D. None of these

3. 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

4. The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?

   A. 10-10 to 106 m

   B. 10-8 to 106 m

   C. 10-10 to 1010 m

   D. 10-8 to 108 m

5. Which on speed C. of the electromagnetic wave is correct ?

   A. C = v
   B. C = /v
   C. C = v
   D. C = 1/

6. 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

7. The refractive index of the ocean water_______________?

   A. Increases with salinity
   B. Increases with temperature
   C. Decreases with salinity
   D. Decreases with temperature

8. 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

9. Remote sensing techniques make use of the properties of ______________ emitted, reflected or diffracted by the sensed objects?

   A. Electric waves
   B. Sound waves
   C. Electromagnetic waves
   D. Wind waves

10. While propagating through homogeneous, isotropic media_________________?

    A. Directions of both the fields are orthogonal
    B. Both the fields are at right angles to the direction of propagation
    C. Both A. and B.
    D. Neither A. nor B.