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A ray of light travels from air to water as shown below. What are ray PQ and ray PR?   Ray PQ Ray PR (A) Reflected ray Refracted ray (B) Reflected ray Reflected ray (C) Refracted ray Refracted ray (D) Refracted ray Reflected ray
Which of the following is the primary specification for weather radar systems, using an airborne pulse Doppler radar?
Which of the given fact of the BEL Battle Field Surveillance Radar is false? 1. It is a man portable 2D short-range battlefield and perimeter surveillance radar. 2. It is developed by the the Electronics and Radar Development Establishment (LRDE) and Bharat Electronics Limited (BEL). 3. Upto 10 radars can be networked at a time. 4. It operates over 12 channels in S band.
Construction of pulse radar is much simpler than a Doppler radar.
Pulse radar operating at 10GHz frequency has an antenna with a gain of 28 dB and a transmitted power of 2kW. If it is desired to detect a target of cross section 12m2, and the minimum detectable signal is -90 dBm, the maximum range of the radar is:
Which of the following describes the time taken by a radar pulse to travel one nautical mile, reflect off a target, and then return to the radar antenna?
A wave is first reflected by a boundary P and then by a boundary Q without dissipating energy. If the boundary P is rigid and the boundary Q is non-rigid, then find the fraction of the amplitude of the reflected wave by boundary P to the reflected wave by boundary Q.
What type of radar is the primary radar?
If a travelling wave or pulse is reflected by a rigid boundary, then the phase difference between the incident and the reflected wave is:
A dishonest shopkeeper purchased one kg pulse at 120 Rs/kg and sell at 150 Rs/kg. He is giving only 800 gm of pulse instead of 1 kg while selling. Which of the following is correct? I. Profit made by the shopkeeper is 56.25% II. Profit on 2 kg pulse is Rs. 100