Principles of Signal Transmission and Reception

The three main components of a laser are lasing medium, pump, and optical resonator. These three components allow the laser to transmit signals through light. Which laser component is responsible for providing energy to the system?

• Lasing Medium

• Optical Resonator

• Pump

• Photodiode

Lasers have been used in a variety of medical procedures, including dermatology, plastic surgery, wound healing, neurostimulation, dentistry, ophthalmology, and many other treatments and surgeries. What characteristics do you think LASER makes very helpful in the medical field?

• Lasers can cut, ablate, vaporize, and coagulate soft tissue

• Lasers can cut soft tissue because of their light color

• Lasers don't have any negative effect on human

• Lasers light contains wavelengths that trigger cancersLaser

Which electromagnetic spectrum does a laser belong to?

• Gamma waves

• Microwaves

• Radiowaves

• Visible light waves

What component in a receiver is commonly responsible for picking up laser values?

• Capacitor

• Counter

• Inductor

• Phototransistor

Aside from the medical field. Laser is also used in communication. It sends information over large distances with low loss. Laser light is used in underwater communication networks. Lasers are used in space communication, radars, and satellites. What could be the reason why laser is used in communication?

• Laser communicates through microwave frequencies

• Laser communicates through millimeter-wavelength

• Laser communicates through powerful radiation

• Laser communicates through light frequencies

RADAR (Radio Detection and Ranging) is a device that uses radio waves to track and correct the location of remote targets and is based on the theory of radio-echo. These radio echoes are used by animals to find food and locate other animals. These sound waves bounce off when the waves hit an object and hit an animal. This process is called echolocation. Which of the following statement is an example of echolocation?

• Chimpanzees search a wide area and may need to dig or shuffle things around to get to their food.

• Dolphins produce short broad-spectrum burst pulses that sound to us like “clicks”

• Cobra smells the air with their forked tongues to track their prey.

• Lions stalk their prey and, when close enough, attempt a short charge on their prey, trying either to pounce on their target or knock it over.

In continuous wave RADAR how is the radio frequency (RF) energy radiated?

• In very short bursts, followed by long resting periods for the reception.

• Continuous wave for propagation with resting periods for the reception.

• In very short bursts, with no resting periods for the reception.

• Continuous wave for propagation without resting periods for the reception.

In radio communications, a radio receiver, also known as a receiver, is an electronic device that receives radio waves and converts the information carried by them to a usable form. Which one of the following is NOT a function of the receiver?

• Amplification

• Demodulation

• Filtering

• Noise figure measurement

A device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.

• RADAR

• LASER

• Radio

• Aamplifier

A device that tracks and fixes the location of targets at a distance using radio waves and operates on the theory of radio echoes.

• RADAR

• LASER

• Radio

• Amplifier