Formation of snow occurs if the cloud temperature is Below the freezing point None of these At the freezing point Just above the freezing point TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statement is incorrect regarding the electromagnetic radiation? The changing electric fields induce the changing magnetic fields in the surrounding medium These are produced by the motion of electric charge The oscillation of charged particles sets up changing electric fields None of these TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct? C = v + λ C = λ/v C = vλ C = 1/λv TRUE ANSWER : ? YOUR ANSWER : ?
Consider the following statements regarding the satellite imaging:<br/>1. The satellite orbit is fixed in the inertial space<br/>2. During successive across-track imaging, the earth rotates beneath the sensor<br/>3. The satellite images a skewed area<br/>Which one of the following statements is/are correct? 2, 3 1, 3 1, 2 1, 2, 3 TRUE ANSWER : ? YOUR ANSWER : ?
If electric permittivity and magnetic permeability of the medium are respectively ‘ε’ and ‘μ’, then the velocity (Cm) of the electromagnetic wave in the medium is given by: Cm = 1/√8 μ Cm = 1/εμ None of these Cm = 5/√εμ TRUE ANSWER : ? YOUR ANSWER : ?
Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by: India Russia USA European Union TRUE ANSWER : ? YOUR ANSWER : ?
The coherence length over which there is a strong relationship between amplitudes is; Directly proportional to the bandwidth None of these The square of the bandwidth Inversely proportional to the bandwidth TRUE ANSWER : ? YOUR ANSWER : ?
The most widely used antenna in GPS is Horn antenna Slotted antenna Microstrip antenna Parabolic antenna TRUE ANSWER : ? YOUR ANSWER : ?
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is: 230 km 250 km 130 km 500 km TRUE ANSWER : ? YOUR ANSWER : ?
Electromagnetic spectrum contains: Ultraviolet rays (wave length < 10⁻⁶ m) Infrared rays (wave length < 10⁻⁴ m) All of these Gamma rays (wave length < 10⁻¹⁰ m) TRUE ANSWER : ? YOUR ANSWER : ?