Question
Which from following colours has highest energy if wave lengths of violet, blue, yellow and red light are 410 nm, 470 nm, 580 nm and 750 nm respectively ?
MHT CET
Chemistry
Structure of Atom
2026
MHT CET 2026 (18 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Blue
- B. Violet
- C. Yellow
- D. Red
Answer
B. Violet
Step-by-step solution
The energy of a photon is given by the Planck-Einstein relation: E = hc where h is Planck's constant, c is the speed of light, and is the wavelength. From the relation, energy is inversely proportional to the wavelength (E 1 ). The given wavelengths are: Violet: 410 nm Blue: 470 nm Yellow: 580 nm Red: 750 nm Since violet light has the shortest wavelength among the given colours, it has the highest energy. Answer: Violet
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