Answer:
0.94 PHz – 1.1 PHz
Explanation:
Case 1. 280 nm
The formula relating the frequency (f) and wavelength (λ) is
fλ = c Divide both sides by f.
f = c/λ
c = 2.998 × 10⁸ m·s⁻¹
λ = 280 nm = 280 × 10⁻⁹ m Calculate f.
f = 2.998 × 10⁸/280 × 10⁻⁹
f = 1.1 × 10¹⁵ s⁻¹ = 1.1 PHz
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Case 2. 320 nm
λ = 320 nm = 320 × 10⁻⁹ m Calculate f.
f = 2.998 × 10⁸/320 × 10⁻⁹
f = 9.4 × 10¹⁴ s⁻¹ = 0.94 × 10¹⁵ s⁻¹ = 0.94 PHz
The frequency range is 0.94 PHz to 1.1 PHz.
