As light from a star spreads out and weakens, do gaps form between the photons?

(a) If this laser has a power of 23 W, how manyphotons does it emit in 1 s?
1 photons

(b) If the light emitted by the laser is absorbed by a blacksail,what is the force on the sail?
2 N

(c) If the light from this laser is reflected from a mirror, whatisthe force on the mirror?
3 N