Electromagnetic waves with wavelength
(i) λ₁ is used in satellite communication
(ii) λ₂ is used to kill germs in water purifier
(iii) λ₃ is used to detect leakage of oil in underground pipelines
(iv) λ₄ is used to improve visibility in runways during fog and mist conditions.
1. Identify and name the part of the electromagnetic spectrum to which these radiations belong.
2. Arrange these wavelengths in ascending order of their magnitude.
3. Write one more application of each.

Identify and name the part of the electromagnetic spectrum to which these radiations belong:
(i) λ₁ used in satellite communication belongs to the radio waves part of the electromagnetic spectrum.
(ii) λ₂ used to kill germs in water purifiers belongs to the ultraviolet (UV) part of the electromagnetic spectrum.
(iii) λ₃ used to detect leakage of oil in underground pipelines typically belongs to the infrared (IR) part of the electromagnetic spectrum.
(iv) λ₄ used to improve visibility in runways during fog and mist conditions belongs to the microwave part of the electromagnetic spectrum.

Arrange these wavelengths in ascending order of their magnitude:
In ascending order of wavelength magnitude (from shortest to longest):
λ₂ (UV) < λ₃ (IR) < λ₄ (Microwave) < λ₁ (Radio waves)

Write one more application of each:
(i) Radio waves (λ₁):
Additional application: Radio waves are used for AM and FM radio broadcasts, enabling the transmission of audio signals over long distances. They are also used for radar systems to detect the speed and location of objects, such as aircraft and weather patterns.

(ii) Ultraviolet (UV) radiation (λ₂):
Additional application: UV radiation is used in UV sterilization systems to disinfect water, air, and surfaces. It is also employed in UV lamps for curing adhesives, inks, and coatings in industrial processes.

(iii) Infrared (IR) radiation (λ₃):
Additional application: IR radiation is used in thermal imaging cameras for various purposes, including night vision, search and rescue operations, and monitoring heat loss in buildings. It is also utilized in remote controls for appliances like TVs and air conditioners.

(iv) Microwave radiation (λ₄):
Additional application: Microwaves are used in microwave ovens for cooking and heating food. They are also employed in telecommunications for point-to-point communication links, satellite communications, and radar technology for weather forecasting and military purposes.