Practice question

Given: A photon has an energy of 5.0 × 10⁻¹⁹J . What is its frequency? (Take h = 6.63 × 10⁻³⁴J s ) These values define the system as per NCERT data. Formula: E = h v. This is standard NCERT relation. Substitution & Calculation: v = E/h = frac5.0 × 10⁻¹⁹⁶.63 × 10⁻³⁴approx 7.54 × 10¹⁴Hz . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.