4- A diffraction grating with slits separated by 8.60 × 10-7 m is illuminated by violet light with a wavelength of 421 nm. If the screen is 80.0 cm from the grating, what is the separation of the lines in the diffraction pattern?

a and c

c is 100% but i am confused in a

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over