Lecture 1 - Spectroscopy Intro

What is spectroscopy?

The interaction of light with matter

What is a spectroscopic transition?

A system moving from one energy level to another, either by gaining or losing a photon of light

What is the wavelength range for visible light?

400nm-700nm

What is the approximate wavelength for blue light?

400nm

What is the approximate wavelength for red light?

700nm

How do you convert nm to m?

1nm = 10^-9nm

What is frequency?

The number of times a wave passes a fixed point

What are the units for frequency?

s^-1 or Hz

What is the speed of light?

c = 2.998 x 10^8 ms^-1

What is the relationship between wavelength, frequency and the speed of light?

c = vλ

What is the relationship between energy, Planck's constant and frequency?

E = hv

What are the units of E in E = hv?

J

How do you calculate 1 mol of photons?

1 mol photons (Jmol^-1) Avogadro's number x E

What is the Avogadro number?

6.022 × 10^23

What is the relationship between frequency and wavenumber?

Wavenumber is directly proportional to frequency

What is the equation for the relationship between wavenumber and wavelength?

wavenumber (v bar) = 1/λ