A red laser ( ) and a blue laser ( ) each illuminate an identical single slit of width

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

A red laser (

\lambda = 650\,\text{nm}

) and a blue laser (

\lambda = 450\,\text{nm}

) each illuminate an identical single slit of width

0.50\,\text{mm}

. Both diffraction patterns are projected onto a screen

2.0\,\text{m}

away. Without performing calculations, state which color will produce the wider central diffraction maximum and briefly explain why.