how do u do this type of problem...
What is the frequency of a photon with a wavelength of 2.25 102 nm? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 Js
c = fw. c is speed of light which you have, f is frequency for which you must solve, w is wavelength which you have. One unknown. Solve for f.
Post your work if you get stuck. Remember to convert nm to meters.
i did 2.99E8 / 2.25E11 and i got 1.33E-3 but this homework is online and it said the answe is wrong and i have the right right sig figs
225 nm is NOT 2.25E11
nm= 10^-9
225nm= 10^-7 m check my thinking
You should be getting 1.33 x 10^15 hz
To find the frequency of a photon, you can use the equation c = fw, where c is the speed of light, f is the frequency, and w is the wavelength. In this case, you know the speed of light (2.998 x 10^8 m/s) and the wavelength (2.25 x 10^2 nm).
First, you need to convert the wavelength from nanometers (nm) to meters (m), because the speed of light is given in meters per second. Since 1 meter is equal to 10^9 nanometers, you can convert the wavelength as follows:
2.25 x 10^2 nm = 2.25 x 10^2 x 10^-9 m = 2.25 x 10^-7 m
Now that you have the wavelength in meters, you can substitute the values into the equation and solve for f:
2.998 x 10^8 m/s = f (2.25 x 10^-7 m)
Dividing both sides of the equation by 2.25 x 10^-7 m gives:
f = (2.998 x 10^8 m/s) / (2.25 x 10^-7 m) = 1.33 x 10^15 Hz
So the correct frequency is 1.33 x 10^15 Hz. It seems that your initial calculation was incorrect because you used the wrong conversion factor for the wavelength. Make sure to double-check your conversions and calculations to ensure accuracy.