The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from: 10-8 to 106 m 10-10 to 106 m 10-10 to 1010 m 10-8 to 108 m TRUE ANSWER : ? YOUR ANSWER : ?
The code based GPS receivers are generally used for: Trans movement Land navigation All of these Vehicle tracking TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statements is correct regarding the GPS satellites? The inclination of axis satellite is 55° All of these The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz) The nominal altitude is about 20,200 km TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following frequency regions is a part of sun's radiation? Ultraviolet frequency region Infrared frequency region Radio frequency region All of these TRUE ANSWER : ? YOUR ANSWER : ?
Electromagnetic spectrum contains: Infrared rays (wave length < 10⁻⁴ m) Gamma rays (wave length < 10⁻¹⁰ m) All of these Ultraviolet rays (wave length < 10⁻⁶ m) TRUE ANSWER : ? YOUR ANSWER : ?
The normal altitude of GPS satellite is about 24,400 km 16,200 km 20,200 km 36,100 km TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called: Reflectance factor Albedo Reflectance None of these TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statement is correct? The radiant energy which falls upon a surface is termed as irradiance The rate of transfer of radiant energy is called flux and is expressed in watts All of these Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation TRUE ANSWER : ? YOUR ANSWER : ?
According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n₁) on another medium (refractive index m₂); Neither (A) nor (B) The angle of incidence is equal to the angle of refraction The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi Both (A) and (B) TRUE ANSWER : ? YOUR ANSWER : ?
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 h = dp/(H/B) h = (H/B) dp h = dp/(B/H) h = (B/H) dp TRUE ANSWER : ? YOUR ANSWER : ?