Phillips, Percy · London : T. C. & E. C. Jack ; New York : Dodge Pub. Co. · leaf 52
to the surface of the glass and a very smalldistance above it. If an eye-piece, E, is brought up so as .j r^*.--^^ g ****»£ Fig. 30. to explore the region just above the other end of theplate-glass, the light reaching it will come partly directfrom the slit and partly by reflection at the glass.… … Fig. 31. from a slit S, Fig. 31, illuminated by a sodium flame isreflected by two mirrors, Mx and M2, which are inclinedvery slightly to one another. The slit is turned so thatit is parallel to the line where the two mirrors meet. D 50 THE SCIENCE OF LIGHT The light reflected from Mx appears to…
Light
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