A high-speed fiber-optic link connects a deep-sea research station to a mainland laboratory. The length of the optical fiber is 6.12 × 106 m.
An optical signal takes 3.00 × 10-2 s to travel from the station to the laboratory.
An infrared laser used to transmit the signal has a wavelength of 1360 nm within the optical fiber.
Calculate the frequency of the infrared laser light inside the fiber, using only the data provided.
64 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties. Each one has a worked solution and a mark scheme showing where the marks go.