The Question is from NEET guide , and it was created by the author NAGA SAI

Question

Which electromagnetic radiation has the longest wavelength?

NAGA SAI · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Electromagnetic Spectrum
 **Related Topics**: Wavelength, Frequency, Energy of photons
 **Prerequisites**: Understanding of the electromagnetic spectrum and its properties.
## SOLUTION PATHWAY
**Given Information**:
  The question asks to identify the electromagnetic radiation with the longest wavelength.
  The options are: Radio waves, Visible light, Infrared radiation, Ultraviolet radiation.
**Method & Steps**:
 1. Recall the electromagnetic spectrum.
  Reasoning: The electromagnetic spectrum arranges electromagnetic waves in order of increasing frequency and decreasing wavelength.
  Formula/Rule:  $c = λf$, where $c$ is the speed of light, $λ$ is the wavelength, and $f$ is the frequency.
 2. Identify the order of wavelengths for the given options.
  Working: Radio waves have the longest wavelength, followed by microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. 
  Key Point:  Wavelength and frequency are inversely proportional. Higher frequency means shorter wavelength, and vice versa.
 3. Determine the radiation with the longest wavelength.
  Result: Radio waves have the longest wavelength among the given options.
  Verification: This aligns with the standard electromagnetic spectrum.
 ## OPTION ANALYSIS
A ✓: Radio waves are known to have the longest wavelengths in the electromagnetic spectrum, ranging from millimeters to kilometers.
B :x: Visible light has a much shorter wavelength than radio waves.
C :x: Infrared radiation has a shorter wavelength than radio waves.
D :x: Ultraviolet radiation has a significantly shorter wavelength than radio waves.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing wavelength and frequency: Remember that wavelength and frequency are inversely proportional.
  2.Incorrect ordering of the electromagnetic spectrum: Memorize the order of the spectrum from longest to shortest wavelength (or vice versa).
 **Quick Tips**:
  1.Remember the acronym ROY G. BIV for the visible light spectrum (Red, Orange, Yellow, Green, Blue, Indigo, Violet) to help remember the order of decreasing wavelength (increasing frequency).
  2.Visualize a diagram of the electromagnetic spectrum to understand the relative wavelengths of different types of radiation.

NAGA SAI · Answer

The correct Option is "Radio waves"

NAGA SAI · Answer

Visible light

NAGA SAI · Answer

Infrared radiation

NAGA SAI · Answer

Ultraviolet radiation

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