11
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
Answer & Solution
Answer: Option
D
12
The refractive index of the ocean water:
A)
Increases with salinity
B)
Increases with temperature
C)
Decreases with salinity
D)
Decreases with temperature
Answer & Solution
Answer: Option
A
13
The changes in the reflectivity/emissivity with time, is called:
A)
Spectral variation
B)
Spatial variation
C)
Temporal variation
D)
None of these
Answer & Solution
Answer: Option
C
14
Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings).
A)
$${\text{h}} > \frac{\lambda }{\Delta }\cos \theta $$
B)
$${\text{h}} = \frac{\lambda }{8}\cos \theta $$
C)
$${\text{h}} > \frac{\lambda }{8}\cos \theta $$
D)
$${\text{h}} < \frac{\lambda }{8}\cos \theta $$
Answer & Solution
Answer: Option
C
15
Which one of the following relationship between the wave length ($$\lambda $$) and frequency and the speed (C) of the electromagnetic wave is correct?
A)
$${\text{C}} = {\text{v}} + \lambda $$
B)
$${\text{C}} = \frac{\lambda }{{\text{v}}}$$
C)
$${\text{C}} = {\text{v}}\lambda $$
D)
$${\text{C}} = \frac{1}{{{\text{v}}\lambda }}$$
Answer & Solution
Answer: Option
C
16
Who coined the term, ‘Remote sensing’.
A)
Evelyn L. Pruitt, a geographer
B)
Gaspard Felix Tournachon, a French scientist
C)
Wilbur Wright, an Italian scientist
D)
None of these
Answer & Solution
Answer: Option
A
17
According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1 ) on another medium (refractive index n2 );
A)
The angle of incidence is equal to the angle of refraction
B)
The angle of refraction ($$\theta {\text{r}}$$) is given by $$\sin {\theta _2} = \frac{{{{\text{n}}_1}}}{{{{\text{n}}_2}}}\sin {\theta _{\text{i}}}$$
C)
Both (A) and (B)
D)
Neither (A) nor (B)
Answer & Solution
Answer: Option
B
18
The most widely used antenna in GPS is
A)
Parabolic antenna
B)
Microstrip antenna
C)
Horn antenna
D)
Slotted antenna
Answer & Solution
Answer: Option
B
19
Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its
A)
Six ground stations
B)
Five ground stations
C)
Four ground stations
D)
Three ground stations
Answer & Solution
Answer: Option
B
20
The normal altitude of GPS satellite is about
A)
16,200 km
B)
20,200 km
C)
24,400 km
D)
36,100 km
Answer & Solution
Answer: Option
B
