Chapter 17.3- the diffraction grating Flashcards
What is the diffraction grating
It is a multi slit device
What is the difference between a diffraction grating and a multi slit device
The bright fringes of a diffraction grating are MUCH narrower. In general, as the number of slits, N, increases, the bright fringes get narrower and brighter
What does in phase mean
That it arrives at the same time. Simultaneously
How do the waves emerge in a diffraction grating
The waves emerge from each slit in phase
What is the integer m called here
The order of diffraction
What is spectroscopy
The science of measuring the wavelengths of atomic and molecular emissions
What happens if the light incident on a grating consists of two slightly different wavelengths?
They will diffract at slightly different angles.
If N is sufficiently large, two distinct figures will appear on the screen
