Arrange the following electromagnetic wave in the order of their increasing wavelength:
(a) γ-rays
(b) Microwaves
(c) X-rays
(d) Radio waves
How are infra-red waves produced? What role does infra-red radiation play in (i) maintain the Earth’s warmth and (ii) physical therapy?
Arrange the following electromagnetic wave in the order of their increasing wavelength:
(a) γ-rays
(b) Microwaves
(c) X-rays
(d) Radio waves
How are infra-red waves produced? What role does infra-red radiation play in (i) maintain the Earth’s warmth and (ii) physical therapy?
The ranges of electromagnetic waves are given below:
(a) γ -rays = <103nm
(b) Microwaves =0.1m to 1 mm
(c) X-rays = 1 nm to 10−5nm
(d) Radio waves=>0.1 m
Electromagnetic waves in the order of their increasing wavelength are
(a) γ -rays
(b) Microwaves
(c) X-rays
(d) Radio waves
Infrared waves are adjacent to the low frequency or long-wavelength end of the visible spectrum. They are produced by hot bodies and molecules.
Visible light from the atmosphere is absorbed by the Earth’s surface and radiated as infrared radiation which gets trapped by greenhouse gases such as carbon dioxide and water vapour. This is how infrared radiation also plays an important role in maintaining the Earth’s warmth.
The molecules of CO2,NH3 and water which are present in most materials absorb infrared waves. Due to this, the molecules heat and heat their surroundings. Hence, their thermal motion increases. Medical instruments, such as the infrared lamp which is used in physiotherapy, work on this principle.
The ranges of electromagnetic waves are given below:
(a) γ -rays = <103nm
(b) Microwaves =0.1m to 1 mm
(c) X-rays = 1 nm to 10−5nm
(d) Radio waves=>0.1 m
Electromagnetic waves in the order of their increasing wavelength are
(a) γ -rays
(b) Microwaves
(c) X-rays
(d) Radio waves
Infrared waves are adjacent to the low frequency or long-wavelength end of the visible spectrum. They are produced by hot bodies and molecules.
Visible light from the atmosphere is absorbed by the Earth’s surface and radiated as infrared radiation which gets trapped by greenhouse gases such as carbon dioxide and water vapour. This is how infrared radiation also plays an important role in maintaining the Earth’s warmth.
The molecules of CO2,NH3 and water which are present in most materials absorb infrared waves. Due to this, the molecules heat and heat their surroundings. Hence, their thermal motion increases. Medical instruments, such as the infrared lamp which is used in physiotherapy, work on this principle.
