An infared wave has a wavelength of 1.5 x10^–6 m. The speed of this wave is 2.2 × 10^8 m/s. Calculate the frequency of the wave. Give your answer in standard form and to 2 significant figures.

First, I would highlight the numbers you need to use for this question and label them as v and λ. This makes them easier to find once you start inputting them into the calculator. Find the equation you need on your equation sheet, this will include speed (v), frequency (f) and wavelength(λ) - λ = v/f. Rearrange formula for f and write this down in your working - f = v/ λ. Substitute the numbers in the question into this equation to find frequency Answer is 1.5 x 10^14 Hz (make sure to write to 2 sig fig otherwise you'll lose a mark).

Answered by Megan H. Physics tutor

2267 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Describe how the strong nuclear force between two nucleons varies with the separation of the nucleons, quoting suitable values for separation.


A cannon ball is fired at an angle 30 degrees from horizontal from a cannon with a speed 30km/h, a) calculate how high the cannonball flies, and the horizontal distance from the cannon the cannonball reaches


Why are fringes are formed in the Young double slit experiment?


When a particle travels in a circle of radius r, at constant speed v, what is its acceleration


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences