Chapter 1: Question 1.9 [ENDORSED]

[Steven Chau 1B]

A college student recently had a busy day. Each of
the student’s activities on that day (reading, getting a
dental x-ray, making popcorn in a microwave oven, and
acquiring a suntan) involved radiation from a different
part of the electromagnetic spectrum. Complete the
following table and match each type of radiation to the
appropriate event.

Based off what the information and what I found, which of these factor (Wave length, Frequency, or Energy of Photon) am I suppose to look at when trying to match the events to the data?

[Thompson W 2C]

You can use the frequencies that you found, and were given to you, to match the events. A lower frequency would mean that it will have a weaker radiation, and higher frequencies would mean it is a stronger type of radiation.

[Justin Bui 2L]

Yup ^^ and because of that, you can also technically look at wavelengths with longer wavelengths having lower radiation and shorter wavelengths with higher radiation

[Sohini Halder 1G]

It helps to think about what kind of wavelength each activity has.

popcorn - microwave
Reading - visible light
Suntan - UV
dental - x ray

You can see the energy increase as you move down the list, the frequency increase, and the wavelength decrease.
Using this, you can reason if your calculated answers make sense.

[Giselle_zamora_1L]

for this specific question, the third part , I converted 300 MHz to Hz and got 3 x 10^8 so when I was doing my calculation I got wavelength as .9 m , can someone explain why the solution says 1 nm, did I mix up some units along the way ?

[Ivan Huang Dis 3B]

I have the frequency and wavelength but how do I get the energy of the photon?

[Natalie Gibson 1c]

I have the frequency and wavelength but how do I get the energy of the photon?

Hi Ivan! To find the energy of the photon we need to use the equation E=hv, plugging in plank's constant for h and our frequency for v. That will give you the energy of the photon!

[Nathalia Garibay 1D]

I have the frequency and wavelength but how do I get the energy of the photon?

Hello!
So to get the energy of the photon, you would use the equation E(Energy of Photon)= h(planck's constant) x v(frequency).

Hope this helps.