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 61
turesconcerned. We have merely to treat of the eye as acombination of lenses that focuses images on the retina. 44 LIGHT LECT. Consider a diagram (Fig. 28) of the structures of thehuman eyeball. The greater part of the refractiveeffect is accomplished by a beautiful piece of trans-parent horny… … C the cornea. R the retina. N the optic nerve. Lj aqueous humour. L2 the crystalline lens. L3 vitreous humour. i the iris diaphragm. b the blind spot. y the yellow spot, or tna-cuia lutea. Fig. 28. lens. But it is immersed in a medium, or rather betweentwo media, a watery medium (L ) in front and a…
Light · X-rays
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