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In "Future's end, part 2", the doctor is fired upon by two Earth militants and the bullets pass through his holographic matrix. Only two scenes prior, with his new holographic projector, he receives and gives punches with starlings associate. How?

marked as duplicate by Mithrandir, TheLethalCarrot, Alith, Mat Cauthon, ApproachingDarknessFish Mar 19 at 8:51

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This is directly explained in VOY S1E5, "Phage." The Doctor's body is composed of photons contained within a forcefield, and he can "modulate" the forcefield at will to either collide with solid matter or pass through it.

PARIS: But a hologram is just a projection of light held in a magnetic containment field. There's no real matter involved.

(The EMH slaps Paris.)

EMH: Now, you hit me.

(Paris's hand passes through the EMH's head.)

EMH: The magnetic containment field that creates the illusion of my body can be modulated to allow matter to pass through it or be stopped.

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    I've bolded 'at will' since it's important to note that he doesn't need to do anything visible to change it. – Valorum Mar 19 at 9:10
  • How does he affect the containment field at will? – Ham Sandwich Mar 20 at 4:42
  • @HamSandwich Presumably the same way he controls the containment field's shape and position when walking. – ApproachingDarknessFish Mar 20 at 6:51

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