A commercial diffraction grating has 300 lines per mm. When a student shines a 470 nm laser through this grating, how many bright spots could be seen on a screen behind the grating

Sorry i don’t know what to do

Hellosubatomic particles  are  particles  that are smaller than the atom. protons, neutrons, and electrons are the three mainsubatomic particles  found in an atom. protons have a positive (+)  charge. an easy way to remember this is to remember that both neutron and no  electrical charge  start with the letter "n."have a nice day

There are no answer choices, so an example would be: it takes a long time and a lot of precision to sew a shirt by hand, so a machine was created to do the job instead.