I wasn't a perfect thing at 17. I didn't have confidence. I was hunched over and real embarrassed, and I didn't want to be in the limelight. But it changed over time.
I can't change the direction of the wind, but I can adjust my sails to always reach my destination.
If diffraction or interference phenomena were to be sought it was therefore necessary, in accordance with the basic principles of wave theory, to select for the test arrangement far smaller decisive dimensions than those employed in corresponding tests with visible light.