Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 55
Fig. … Fig. 21. densers ; and by turning the arm around in the condenser-tube canbe used at any angle. LIGHTS AND SHADOWS 39 sine of refraction) and the length AB (the sine of inci-dence) is always just the proportion of 2 to 3, whateverthe obliquity of the incident beam. When the incidentbeam falls at…
Light · X-rays
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