Which of the following radiations of electromagnetic waves has the highest wavelength ?
Which of the following radiations of electromagnetic waves has the highest wavelength ?
- IR- Rays
- X- Rays
- Microwave
- UV- Rays
The Correct Option is C
Approach Solution - 1
The electromagnetic spectrum encompasses a wide range of radiation types, each characterized by its wavelength and frequency. The relationship between wavelength (\(\lambda\)) and frequency (\(f\)) is given by \(c = \lambda f\), where \(c\) is the speed of light. This means that radiation with a higher wavelength has a lower frequency, and vice versa.
Considering the common types of electromagnetic radiation:
- Radio waves
- Microwaves
- Infrared radiation
- Visible light
- Ultraviolet radiation
- X-rays
- Gamma rays
The order of these radiations from longest to shortest wavelength is:
- Radio waves
- Microwaves
- Infrared
- Visible Light
- Ultraviolet
- X-Rays
- Gamma Rays
Therefore, among the options typically presented, microwaves have a higher wavelength than other radiation types such as infrared, visible light, ultraviolet, X-rays and Gamma rays. Radio waves have the highest wavelength in the entire EM spectrum.
Thus, the electromagnetic radiation with the highest wavelength from the expected choices is:
Microwave
Approach Solution -2
Among the given options, Microwaves have the highest wavelength.
The electromagnetic spectrum, in order of increasing frequency (decreasing wavelength) is:
- Radio waves
- Microwaves
- Infrared (IR)
- Visible light
- Ultraviolet (UV)
- X-rays
- Gamma rays
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Concepts Used:
Electrostatic Potential
The electrostatic potential is also known as the electric field potential, electric potential, or potential drop is defined as “The amount of work that is done in order to move a unit charge from a reference point to a specific point inside the field without producing an acceleration.”
SI Unit of Electrostatic Potential:
SI unit of electrostatic potential - volt
Other units - statvolt
Symbol of electrostatic potential - V or φ
Dimensional formula - ML2T3I-1
Electric Potential Formula:
The electric potential energy of the system is given by the following formula:
U = 1/(4πεº) × [q1q2/d]
Where q1 and q2 are the two charges that are separated by the distance d.