Question

calculate the frequency of the red light emitted by a neon sign with a wavelength of 659.9nm​

Answer 1

Answer:

The relationship between frequency and wavelength is defined as: L = V/F, where L = wavelength, m V = speed, m/s F = frequency, 1/sec (Hz) Since it is light, it is moving at 3x10^8 m/s = V L = 659.9 nm = 6.599x10^-7 m F = V/L = 3x10^8 m/s / 6.599x10^-7 m = 4.54x10^11 Hz, or about 454 THz F = V/L

Explanation:

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Answer 2

The frequency of the red light emitted by a neon sign is 4.54×10¹¹ Hz

Frequency is the number of waves which passes through a fixed point at a certain time.

Explanation:

• Given neon sign with a wavelength of 659.9nm​
• frequency of the red light is to be calculated
• Wavelength and frequency are related to each other by Wavelength=Speed/frequency
• speed of light is 3×10⁸ m/s
• Wavelength=659.9nm that is equal to 6.599 ×10⁻⁷m

• Frequency =3×10⁸ m/s÷6.599 ×10⁻⁷m

• Frequency =4.54×10¹¹ Hz

The frequency of the red light emitted by a neon sign is 4.54×10¹¹ Hz