Emission from a particular LED has linewidth 16nm centred on the mean wavelength 561 nm. Which ONE of the following is correct? (There is only one.) (Make sure you understand the terms "coherence time" and "coherence length", and check out the similar example in Lecture 11.) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b d e f The frequency bandwidth is 5.3 x 10¹4 Hz and the coherence length is tens of microns. The frequency bandwidth is 1.5 x 1013 Hz and the coherence time is 1 femto-second. The frequency bandwidth is 5.3 x 10¹4 Hz and the coherence length is 16 nm. The coherence length is 561 nm and the coherence time is of order 0.1 pico-seconds. The coherence length is 561 nm and the frequency is 5.3 x 10¹4 Hz. The frequency bandwidth is 1.5 x 10¹3 Hz and the coherence length is tens of microns.

Emission from a particular LED has linewidth 16nm centred on the mean wavelength 561 nm. Which ONE of the following is correct? (There is only one.) (Make sure you understand the terms "coherence time" and "coherence length", and check out the similar example in Lecture 11.) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b d e f The frequency bandwidth is 5.3 x 10¹4 Hz and the coherence length is tens of microns. The frequency bandwidth is 1.5 x 1013 Hz and the coherence time is 1 femto-second. The frequency bandwidth is 5.3 x 10¹4 Hz and the coherence length is 16 nm. The coherence length is 561 nm and the coherence time is of order 0.1 pico-seconds. The coherence length is 561 nm and the frequency is 5.3 x 10¹4 Hz. The frequency bandwidth is 1.5 x 10¹3 Hz and the coherence length is tens of microns.