Practice question

Given: Calculate the wavenumber of light with wavelength 5800 Å . (1 Å = 10 ⁻¹⁰ m) These values define the system as per NCERT data. Formula: Wavenumber barnu = 1/lambda. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: lambda = 5800 Å = 5800 × 10⁻¹⁰ m = 5.8 × 10⁻⁷ m . barnu = frac15.8 × 10⁻⁷= 1.724 × __10POW₆__m^{-1 . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.