544 



Interference and Diffraction. 



No. 54 502 



54 504. 1 : 2. 



54 514. 1 : 3. 



54509 54512. 1:7. 



54 517 A. 1:2. 



54 517 B. 1:2. 



54.502. 2 Glass Discs clamped together, with layer between, for demonstrating interference 

 in wedge-shape air plates (M. T. p. 211; M. P. 10 th Edn., II, 1, Fig. 608) 



54.503. 2 Gold Leaves between Glass Plates, one appearing green and one blue when light 

 is transmitted 



54.504. Comparison of Superficial Colours, after Hartl, Figure; in reflected and incident 

 light the colours of the four different thin plates appear in the complementary colours 

 (Ztschr. f. d. phys. u. chem. U. 20, 1907, p. 133) 



* Newton's Colour Glasses, in brass mounts, with 6 pressure screws, for observing the inter- 



ference rings in a subjective and objective manner: 



List No. 54,505 54,506 54,507 54,508 

 Diameter mm 70 100 120 150 



0.16.0 1.0.0 1.4.0 1.12.0 



* -- idem, rotary on stand, Figure. 



List No. 54,509 54,510 54,511 54,512 

 Diameter mm 70 100 120 150 



1.12.0 1.18.0 2.4.0 2.10.0 



54,513. Colour Ring Apparatus for Students' Exercises, after Grimsehl, for determining wa\e- 

 lengths by the aid of Newton's Colour Kings: comprising a reflector, a spectacle lens, 

 a small auxiliary apparatus and an attachment for producing monochromatic light 

 for Bunsen burners (E. Grimsehl, Ausgewahlte Schuleriibungen, Fig. 11) 



* 54,514. Interference Apparatus for Fresnel's Mirror Experiment, Figure, for screwing 



into the objective holder of the Projection Apparatus, in place of the objective, with 

 adjustable gap, adjustable black mirrors and diaphragm; for Projection Apparatuses 



having 43 mm cliam. objective 



This apparatus considerably facilitates the carrying out of Fresnel's Experiment, since the gap 

 and mirrors are combined ready for use. 



* 54,515. --idem, for Projection Apparatuses having 55 mm diam. objective 



* 54,516. idem, for Projection Apparatuses having 60 mm diam. objective . . . 



s. d. 

 0. 4.0 



0. 3.0 



0. 8.0 



0.14. (> 



4. o. <t 



4. 0. (> 

 4. <>. it 



* Can be used with th? Projection Apparatus. 



Cl. 4938, 5791, 

 353. 1577, 1578. 



