Question 1

What is petahertz?

Accepted Answer

10^15 Hz. Visible light ranges from 400-800 THz, approaching petahertz. UV light is higher.

Question 2

What operates at petahertz?

Accepted Answer

Far ultraviolet light, soft X-rays. No electronics operate here—these are optical frequencies.

Question 3

What's the relationship between frequency and wavelength?

Accepted Answer

They're inversely related: wavelength × frequency = wave speed. For sound in air: wavelength (m) ≈ 343 / frequency (Hz).

Question 4

Why use Hz vs RPM?

Accepted Answer

Hz (cycles per second) is universal for waves and oscillations. RPM (revolutions per minute) is more intuitive for rotating machinery and engines.

Petahertz to Hertz Frequency Converter - Free Online Tool

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