The Question is from NEET guide , and it was created by the author P.NARASIMHA

Question

Which of these electromagnetic waves has the shortest wavelength?

P.NARASIMHA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Electromagnetic Spectrum
 **Related Topics**: Wavelength, Frequency, Energy of electromagnetic waves
 **Prerequisites**: Understanding of the electromagnetic spectrum and the relationship between wavelength, frequency, and energy.
## SOLUTION PATHWAY
**Given Information**:
  Radio waves, Microwaves, Ultraviolet rays, Gamma rays
  We need to determine which has the shortest wavelength.
**Method & Steps**:
 1. Recall the electromagnetic spectrum.
  Reasoning: The electromagnetic spectrum arranges electromagnetic waves in order of increasing frequency and decreasing wavelength.  The order is: Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays.
  Formula/Rule: $c = fλ$, where $c$ is the speed of light, $f$ is the frequency, and $λ$ is the wavelength.  Since $c$ is constant, higher frequency means shorter wavelength.
 2. Identify the wave with the highest frequency (and therefore shortest wavelength).
  Working: From the electromagnetic spectrum, Gamma rays have the highest frequency.
  Key Point:  Frequency and wavelength are inversely proportional.
 3. Conclude which wave has the shortest wavelength.
  Result: Gamma rays have the shortest wavelength.
  Verification:  The order of the electromagnetic spectrum confirms this result.
 ## OPTION ANALYSIS
A :x: Radio waves have the longest wavelength in this list.
B :x: Microwaves have a longer wavelength than ultraviolet and gamma rays.
C :x: Ultraviolet rays have a longer wavelength than gamma rays.
D ✓: Gamma rays have the shortest wavelength among the given options. They possess the highest frequency and energy within the electromagnetic spectrum.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing wavelength and frequency: Remember that wavelength and frequency are inversely proportional. Higher frequency means shorter wavelength.
  2.Incorrect ordering of the electromagnetic spectrum: Memorize the order of the electromagnetic spectrum to quickly answer these types of questions.
 **Quick Tips**:
  1.Visualize the electromagnetic spectrum: Create a mental image of the spectrum to easily recall the order of waves and their relative wavelengths.
  2.Mnemonic device: Use a mnemonic device to remember the order of the electromagnetic spectrum (e.g.,  Raging Martians Invaded Venus Using X-ray Guns).

P.NARASIMHA · Answer

Radio waves

P.NARASIMHA · Answer

Microwaves

P.NARASIMHA · Answer

Ultraviolet rays

P.NARASIMHA · Answer

The correct Option is "Gamma rays"

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