Red light of wavelength 633 nmnm from a helium-neon laser passes through a slit 0.300 wide. The diffraction pattern is observed on a screen 3.70 mm away. Define the width of a bright fringe as the distance between the minima on either side.

 f = 1 10 8 Hz

Explanation:

The speed of an electromagnetic wave is given by

         c = λ f

In our case, the wavelength is 3.0 m, so we can clear the frequency

         f = c /λ

         f = 3 10⁸/3.

          f = 1 10 8 Hz

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada