What does the LED spectrum look like with a transmissiongrating?

Principle

Because stray light barely affects this measurement, the clasroom only needs to be slightly darkened in order to make the interferences on the screen visible. The distances must be measured very precisely because even a small imprecision will lead to large deviations in the result.

Benefits

• Specified for the requirements of the german final secondary-school examinations
• Especially for secondary schools
• Quantum and wave optics in a student experiment

Tasks

What does an LED spectrum look like through a transmission grating?

The wavelength of light can be determine in a great number of ways. In this experiment you will be introduced to the so-called objective method with transmission grating. The name "transmission grating" means that the light passes through the grating and experiences interference while doing so.
 
Determine the wavelength of maximum intensity with a transmission grating.