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____________________?

Related Mcqs:

1. 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

2. 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

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. In case of reflection and refraction of electromagnetic radiation ?

   A. Angle of incidence = angle of refraction
   B. Angle of incidence = angle of reflection
   C. Angle of refraction = sum of the angles of incidence and refraction
   D. All the above

5. 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

6. 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°

7. 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

8. 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.

9. 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

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

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