#### Elements of Remote Sensing

1

Pick up the correct statement from the following:

A. The wave length of gamma rays is 10^(-10) m
B. The wave length of radio rays is 10^6 m
C. The visible length occupies a small portion of the electromagntic spectrum extending roughly from 0.4 mu m to 0.7mu m wave length
D. All of these

2

The solid angle subtended by the sphere is

A. 2 pi
B. 3 pi
C. 4 pi
D.  6 pi

3

Which one of the following frequencies is a GPS ?

A.  L_1 with frequency 1520 MHz
B. L_1 with frequency 1575.42 MHz
C.  L_1 with frequency 1227.6 MHz
D. L_1 with frequency 1280.43 Hz

4

The maximum absorption of solar radiation due to ozone occurs at wave lengths

A. shorter than 0.3mu m
B. shorter than 0.2 mu m
C. greater than 0.3 mu m
D. None of these

5

Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :

A. visible region, 0.4 mu m - 0.7 mu m
B. short wave infrared region, 0.7 mu m - 1.5 mum
C. near infrared region, 1.5 mu m - 3.0 mum
D. microwave infrared region, 3.0 mu m - 8.0 mum