Print of The Microscope
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Framed Print of The microscope; an introduction to microscopic methods and to histology
The microscope; an introduction to microscopic methods and to histology. Microscopes. 274 INDEX OF REFRACTION [Ch. IX greater than unity. Whenever the refractive index of a substance is given, the absolute index is meant unless otherwise stated. For ex- ample, when the index of refraction of water is said to be 1.33, and of crown glass 1.52, etc. these figures represent the absolute index, and the incident ray is supposed to be in a vacuum. § 448. Relative index of re- fraction. — This is the index of refraction between two contigu- ous media, as for example be- tween glass and diamond, wat. The microscope; an introduction to microscopic methods and to histology. Microscopes. 274 INDEX OF REFRACTION [Ch. IX greater than unity. Whenever the refractive index of a substance is given, the absolute index is meant unless otherwise stated. For ex- ample, when the index of refraction of water is said to be 1.33, and of crown glass 1.52, etc. these figures represent the absolute index, and the incident ray is supposed to be in a vacuum. § 448. Relative index of re- fraction. — This is the index of refraction between two contigu- ous media, as for example be- tween glass and diamond, water and glass, etc. It is obtained by dividing the absolute index of refraction of the substance containing the refracted ray, by the absolute index of the sub- stance transmitting the incident ray. For example, the relative index from water to glass is 1.52 divided by 1.33. If the light passed from glass to water it would be, 1.33 divided by 1.52. By a study of the figures showing refraction, it will be seen that the greater the re- fraction the less the angle and consequently the less the sine of the angle, and as the refraction between two media is the ratio. Fig. 156. Refraction of Light nsr Passing from Glass to Air. N Normal to the refracting surface. sin i In this case sin 34° 45 or 0.56975 sin r In this case sin 60° or 0.86603 _ I I-S2 If fig. 155 and 156 are compared it will be seen that the ray of light follows exactly the same path in leaving the denser me- diimi that it took on entering it. of the sines of the angles of incidence and refraction, it win be seen that whenever the sine of the angle of refraction is increased by being in a less refractive medium, the index of refraction will show a corresponding decrease and vice versa. That is, the ratio of the sines of the angles of incidence and refraction of any two contiguous substances is inversely as the refractive indices of those substances. The formula is: /Sine of angle of incident ray _ /Index of refr. © The Book Worm
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Media ID 41600705
Modern 12"x10"
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Made and Shipped from within the USA or Canada as appropriate. Printed on 10"x8" Premium Matte Paper offering bright, white paper with a matte finish with a digitally rendered mat surround offering the timeless look of professionally mounted artwork. Our 1″ Frames are available in a range of colours with clear acrylic shatterproof glazing and Kraft pad backer. Matte Paper offer a lighter-weight alternative to fine art paper which is optimized for artwork and can be suitable for photography in scenarios where a less glossy appearance is preferred. This sustainable paper printing is an alternative to our premium fine art paper. Each frame is 1″ wide by 3/4″ deep and glazed using standard 1/16” clear PETG to protect and enhance the visibility of each print. Ready to hang with a sawtooth metal hanger and sturdy backer.
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 20.4cm x 14.5cm (8" x 5.7")
Estimated Product Size is 30.5cm x 25.4cm (12" x 10")
