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Chemistry · Structure of atom

हिन्दी

What is the frequency of violet light if its wavelength corresponds to the upper limit of the visible spectrum given as \( 7.50 \times 10^{14} \) Hz? (Wait, let's consider frequency as \( 7.50 \times 10^{14} \) Hz. If the visible spectrum ranges from violet at \( 7.50 \times 10^{14} \) Hz to red at \( 4 \times 10^{14} \) Hz, what is the wavelength corresponding to red light? Use \( c = 3 \times 10^8 \text{ m s}^{-1} \)):

  1. \( 3.0 \times 10^{-7} \text{ m} \)
  2. \( 4.0 \times 10^{-7} \text{ m} \)
  3. \( 6.0 \times 10^{-7} \text{ m} \)
  4. \( 7.50 \times 10^{-7} \text{ m} \)

Correct answer · Option 4

\( 7.50 \times 10^{-7} \text{ m} \)

Explanation

Using \( \lambda = \frac{c}{\nu} = \frac{3 \times 10^8 \text{ m s}^{-1}}{4 \times 10^{14} \text{ s}^{-1}} = 7.50 \times 10^{-7} \text{ m} \).
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