Question

A) 6.10¹⁶ Hz
B) 5.10¹⁴ Hz
C) 2.10⁻¹⁴ Hz
D) 6.10¹⁴ Hz

Answer 1

$c = 3\cdot 10^8m/s\\\lambda = 49 \cdot 10^{-8}m\\\\c = \lambda f\\f = \frac{c}{\lambda}\\f = \frac{3 \cdot 10^8}{49 \cdot 10^{-8}}\\f \approx 0,06 \cdot 10^{8 + 8}\\f \approx 0,06 \cdot 10^{16}\\\boxed{f \approx 6,0 \cdot 10^{14}Hz}$