Question
Download Solution PDFLight with longest wave length in visible spectrum is _____?
This question was previously asked in
Official Soldier Technical Paper : [Goa] - 23 Feb 2020
Answer (Detailed Solution Below)
Option 2 : Red
Free Tests
View all Free tests >
Indian Army Agniveer Technical 2023 Memory Based Paper.
2.7 K Users
50 Questions
200 Marks
60 Mins
Detailed Solution
Download Solution PDFCONCEPT:
- Light or visible light commonly refers to electromagnetic radiation that can be detected by the human eye.
- The entire electromagnetic spectrum is extremely broad, ranging from low energy radio waves with wavelengths that are measured in meters to high energy gamma rays with wavelengths that are less than 1 × 10-11 meters.
- Visible light is usually defined as having wavelengths in the range of 400-700 nanometers (nm), or 4 × 10-7 to 7 × 10-7m between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).
- This wavelength means a frequency range of roughly 430-750 terahertz(THz).
EXPLANATION:
- As we can see in the diagram that Red light has the longest wavelength.
- Hence option 2 is the answer.
Last updated on Jun 5, 2025
->Indian Army Technical Agniveer CEE Exam Date has been released on the official website.
-> The Indian Army had released the official notification for the post of Indian Army Technical Agniveer Recruitment 2025.
-> Candidates can apply online from 12th March to 25th April 2025.
-> The age limit to apply for the Indian Army Technical Agniveer is from 17.5 to 21 years.
-> The candidates can check out the Indian Army Technical Syllabus and Exam Pattern.