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°

Leaf reflectance depends primarily on______________?

A. The pigments
B. Internal cell structur
C. Equivalent water content
D. All of these

Which one of the following errors is produced by platform characteristics of the sensor ?

A. Altitude variation
B. Altitude
C. Orbit drift
D. All of these

If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height___________________?

A. H = dp/(b/h)
B. H = (b/h) dp
C. H = dp/(h/b)
D. H = (h/b) dp

Pick up the correct statement from the following_________________?

A. When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed
B. When the electric vector is in the plane of incidence, vertical polarisation is formed
C. When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed
D. All of these

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called_________________?

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

First Pakistani Lady Cop to receive ‘Sword of Honour’ is_______?

A. Shaista riffat
B. Qurat-ul-ain
C. Faryal fareed
D. Soniya noor

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

Geodimeter is based on_________________?

A. Propagation of modulated light waves
B. Propagation of infrared radiation
C. The light as carrier with frequency of the order of 5 × 1014 hz
D. High frequency radio waves

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.