Scientific amusements . Reflection ol mirrors (I). of the mirror, but they will if produced meet at a, and thepoint A will be reflected there ; similarly B will be reflectedat b, and thus a magnified image will appear behind or atthe back of the mirrors surface. In the next diagram the. Reflection of mirrors (II). second supposed case will produce the image in the air ata b, and if a sheet of paper be held so that the rays are? intercepted, the image will be visible on the sheet. Inthis case the perpendicular ray, An, is reflected in thesame direction, and the ray, a c, parallel with the axis,
Scientific amusements . Reflection ol mirrors (I). of the mirror, but they will if produced meet at a, and thepoint A will be reflected there ; similarly B will be reflectedat b, and thus a magnified image will appear behind or atthe back of the mirrors surface. In the next diagram the. Reflection of mirrors (II). second supposed case will produce the image in the air ata b, and if a sheet of paper be held so that the rays are? intercepted, the image will be visible on the sheet. Inthis case the perpendicular ray, An, is reflected in thesame direction, and the ray, a c, parallel with the axis, is 40 LIGHT. reflected to the focus. These rays meet at a and corre-sponding rays at b, when the image will be reproduced ;viz., in front of the mirror. Tke concave mirror is used in the manufacture oftelescopes, which, with other optical instruments, will bedescribed in their proper places. We will now look atthe Refraction of light. Bodies which permit rays of light to pass through themare termed transparent. Some possess this property morethan others, and so long as the light passes through thesame medium the direction will remain the same.; But ifa ray fall upon a body of a different degree of density itcannot proceed in the same direction, and it will be brokenor refract
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
