Light Has a Frequency of 7

question 33

Multiple Choice

Light has a frequency of 7.21 × 10¹³ hertz. What is its wavelength? The speed of light is 3.00 × 10⁸ m/s.

• A) 2.16 × 10⁹ nm
• B) 2.40 × 10⁵ nm
• C) 4.16 × 10³ nm
• D) 2.40 × 10^-4 nm
• E) 4.16 × 10^-6 nm

---

Definitions:

Cognitive Revolution

A significant shift in psychology during the 1950s-1960s, focusing on studying mental processes and structures.

Narcolepsy

A chronic sleep disorder marked by overwhelming daytime drowsiness and sudden attacks of sleep, often linked to a deficiency in the brain chemical orexin.

Voluntary Muscles

Muscles that can be consciously controlled by the brain to produce movements.

Deep Sleep

A stage of sleep characterized by slow brain waves, known for its role in restorative sleep.