Answer:
15
integers from 1 to 9 have only one number each, so in total 9 numbers. integers from 10 to 12 have 2 numbers each, 3*2=6. 9+6=15
Answer:0.369 m
Step-by-step explanation:
Given
Distance between slit and screen is
Wavelength
Angle between zeroth order bright fringe and Fourth-order bright fringe is
let distance between the slits be d
Distance of n th bright fringe From central Fringe is given by
Also
Heres a tip---- if it has a square its 90 degrees if it doesnt its 180 and if its in an x shape theyre equal