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 : ?
While propagating through homogeneous, isotropic media, Both (A) and (B) Both the fields are at right angles to the direction of propagation Directions of both the fields are orthogonal Neither (A) nor (B) TRUE ANSWER : ? YOUR ANSWER : ?
Earth observations from a satellite platform provide: All of these Synoptic view of a large area Repetitive observations of the same area with intervals of a few minutes to a few weeks Constant solar zenith angles and similar illumination conditions TRUE ANSWER : ? YOUR ANSWER : ?
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is: 500 km 250 km 130 km 230 km TRUE ANSWER : ? YOUR ANSWER : ?
A perfectly black body: Emits power of every wave length All listed here Is a diffuse emitter Absorbs all the radiations of every wave lengths TRUE ANSWER : ? YOUR ANSWER : ?
The various stages occuring in GPS system are described below:<br/>1. Generation of an output to the user<br/>2. Detection of the GPS signals<br/>3. Processing the data in the built-in-computer<br/>4. Decoding the GPS signal.<br/>The correct sequence of the stages is: 2, 4, 3, 1 2, 3, 4, 1 1, 2, 3, 4 3, 1, 2, 4 TRUE ANSWER : ? YOUR ANSWER : ?
Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its Six ground stations Three ground stations Four ground stations Five ground stations TRUE ANSWER : ? YOUR ANSWER : ?
The value of energy quantum for radiation of any frequency is proportional to: The square of the frequency The square root of the frequency The reciprocal of the energy The frequency 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 = λ/v C = 1/λv C = vλ C = v + λ TRUE ANSWER : ? YOUR ANSWER : ?
Geodimeter is based on: Propagation of modulated light waves Propagation of infrared radiation High frequency radio waves The visible light as carrier with frequency of the order of 5 × 1014 Hz TRUE ANSWER : ? YOUR ANSWER : ?