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multiple reflection
construct.	Interflexion f
opt.	vielfache Reflexion; wiederholte Reflexion; Vielfachreflexion f
phys.	Mehrfachspiegelung f
tech.	Mehrfachreflexion f
multiple reflections
el.	Mehrfachreflexion f
geophys.	multiple Reflexionen; Mehrfachreflexionen f
opt.	mehrfache Spiegelungen (from mirrors)

multiple reflection: 7 phrases in 2 subjects

Environment	1
Optics branch of physics	6