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).

MH
Answered by Megan H. Physics tutor

2327 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

What is the maximum height a pole vaulter could reach?


Derive I = nAVe


How does light from distant stars show how fast they are moving away from us.


Determine an approximate value for the acceleration of free fall using a tennis ball, metre ruler and a stopwatch.


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