Practice question

Given: Calculate the wavelength of radiation with a frequency of 4.0 × __10POW₁₄__Hz. (c = 3.0 × __10POW₈__m s^{-1) Formula: Wavelength lambda = c/nu = frac3.0 × __10POW₈₄__.0 × __10POW₁₄__= 7.5 × 10⁻⁷m = 750 nm.. Substitution: Substituting given values into formula as per NCERT 2026-27 method. Calculation: Simplifying step by step with proper SI units like m/s², J kg⁻¹ K⁻¹, 10⁻⁵, A m⁻¹ etc. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.