EXHIBIT: "Invisible Light: Infared Photography"; B.U. Gallery CLASSICAL: Works by B.U. Composition Students; B.U. Concert Hall; Tuesday at 12:30 p.m. CLASSICAL: B.U. Wind Ensemble; Paul Gay, director with student conductors; music of Milhaud, Donizetti, Dahl, Husa and Villa-Lobos; B.U. Concert Hall; Tuesday at 8 p.m.

CLASSICAL: "Encounters With Composers: Chamber Music"; music of Ginastera; B.U. Concert Hall; Thursday at 8 p.m.

CLASSICAL: B.U. Symphony Orchestra; Mario di Bonaventura, conductor; music of Haydn and Ginastera; B.U. Concert Hall; Friday at 8 p.m.

CLASSICAL: Empire Brass Quintet; music of Schumann, Etler, Telemann et al.; Morse Auditorium; Saturday at 8 p.m.

THEATER: "The Millionairess"; B.U. Theater; Saturday, Sunday and Tuesday at 8 p.m., Wednesday at 7:30 p.m.