Nothing. You working is fine to either you have made a numerical error somewhere, or you have not entered the correct number of significant digits.shimizua said:oh so i think this is a second part to the question also. How long will it take for a message from Earth to reach the first astronauts who arrive on Mercury; assume Mercury is at its closest approach to Earth (9.17×107km)?
well i just did that distance 9.17x10^7 km and got it to m and then divided is by 3x10^8 which is the speed of light so what did i do wrong for that part?
If you were to assume that the radio wave was traveling through space (which is a pretty good approximation for air), what would be its speed?shimizua said:Homework Statement
An FM station broadcasts at 107.5 MHz. What is the wavelength of this wave?Homework Equations
well i know that speed = frequency X wavelenght but if i don't know the speed then how can i find the lengthThe Attempt at a Solution
so i found out that the average length of a radio wave is about 3 m and tried it but it was the wrong answer. i am just confused how to find the wavelength with only the frequency.
Sounds good to me.shimizua said:would i just use 3x10^8 m/s?
No problem.shimizua said:oh wait i think i did have my decimals mixed up for the problem about the time. haha thanks
The wavelength is the distance between two consecutive peaks or troughs in a wave. It is typically measured in meters or nanometers.
Wavelength and frequency are inversely proportional. This means that as the wavelength increases, the frequency decreases, and vice versa. The relationship is described by the equation: wavelength = speed of light / frequency.
The unit of wavelength depends on the type of wave being measured. For electromagnetic waves, such as light, the unit is typically meters or nanometers. For sound waves, the unit is usually meters or centimeters.
Wavelength has a direct impact on the properties of waves. Waves with longer wavelengths have lower frequencies and lower energy, while waves with shorter wavelengths have higher frequencies and higher energy. Wavelength also determines the color of light and the pitch of sound.
Wavelength and energy are inversely proportional. This means that as the wavelength increases, the energy decreases, and vice versa. This relationship is described by the equation: energy = Planck's constant x speed of light / wavelength.