Answer:
B = Frequency = 4.3 × 10¹⁴Hz
Explanation:
Given data:
Speed of light = 3 × 10⁸ ms⁻¹
Wavelength of light = 7.0 × 10⁻⁷ m.
Frequency = ?
Solution:
Formula:
Speed of light = wavelength × frequency
Frequency = Speed of light /wavelength
Frequency = 3 × 10⁸ ms⁻¹ /7.0 × 10⁻⁷ m.
Frequency = 0.43 × 10⁸⁺⁷ s⁻¹
Frequency = 0.43 × 10¹⁵s⁻¹
s⁻¹ = Hz
Frequency = 4.3 × 10¹⁴Hz
