Question

Remote Sensing is carried out with the help of solar energy is known as :

• A. Active remote sensing
• B. Passive remote sensing
• C. Thermal remote sensing
• D. Microwave remote sensing

Answer 1

Answer:

B. Passive remote sensing

Remote sensing

• Method of collecting information about an object, place or phenomenon without actual physical contact is remote sensing

• Devices used for data collection in remote sensing are called sensors.

• Cameras and scanners are sensors.

• The sensors record the electromagnetic radiations reflected by objects.

• The carrier on which sensors are fixed is called a platform.

• Sensors can be installed on balloons, air crafts and satellites

• Based on the source of energy and the platform remote sensing can be classified as follows.

■ Passive Remote Sensing

■ Active Remote Sensing

• Remote Sensing is carried out with the help of solar energy is known as passive remote sensing. Here the sensors do not emit energy by itself.

• Remote Sensing made with the aid of artificial source of energy radiating from the sensor is known as active remote sensing.