Question

OPIC # 8 WAVES QUESTION Q23/P13/M/J/16 21 A beam of red laser light has length 1.0m. What is the order of magnitude of the number of wavelengths of the red light in 1.0m? A 10^4 B 10^6 C 10^8 D 10^10​

Answer 1

The order of magnitude of the number of wavelengths of red light in 1.0m is B) 10^6.

Step-by-step explanation:

The wavelength of red laser light is around 700 nm, or 7 x 10^-7 meters. Therefore, the number of wavelengths of red light in 1.0 meter is (1.0 m) / (7 x 10^-7 m) = 1.0 / 7 x 10^-7 = 1.0 / 7 x 10^7 = approximately 10^7. The order of magnitude is 10^6.