 ... of light falls upon a concave lens. Trace the position of the image as the point of convergence of the pencil moves from an infinite distance up to the lens. 24. What is meant by the statement — the focal length of a given convex lens is 2 feet...  Elementary Lessons in Heat, Light and Sound - Page 211by Daniel Evan Jones - 1905 - 279 pagesFull view - About this book
 | Daniel Evan Jones - Mathematical physics - 1888 - 332 pages
...of it : if the focal length of the lens is 8 in., find the position and magnitude of the image. 66. Draw figures, approximately to scale, showing the...when a luminous object is placed at a distance of (i) I inch, (2) 6 inches from a convergent lens of 2 in. focal length. 67. An object is placed 8 in.... | |
 | Sir Richard Glazebrook - Heat - 1894 - 236 pages
...the focal length of a given convex lens is 2 feet ? Draw a figure, approximately to scale, indicating the paths of the rays of light and the positions of the images formed, when an object is placed (a) at a distance of 6 feet, (//) at a distance of 1 foot from such a lens. 25.... | |
 | Sir Richard Tetley Glazebrook - Heat - 1894 - 482 pages
...the focal length of a given convex lens is 2 feet ? Draw a figure, approximately to scale, indicating the paths of the rays of light and the positions of the images formed, when an object is placed (a) at a distance of 6 feet, (6) at a distance of 1 foot from such a lens. 25.... | |
 | Sir Richard Glazebrook - Light - 1894 - 292 pages
...the focal length of a given convex lens is 2 feet ? Draw a figure, approximately to scale, indicating the paths of the rays of light and the positions of the images formed, when an object is placed (a) at a distance of 6 feet, (6) at a distance of 1 foot from such a lens. 25.... | |
 | Daniel Evan Jones - 1896 - 378 pages
...of it : if the focal length of the lens is 8 in., f1nd the position and magnitude of the image. 94. Draw figures, approximately to scale, showing the...when a luminous object is placed at a distance of (1) I inch, (2) 6 inches from a convergent lens of 2 in. focal length. 95. An object is placed 8 in. from... | |
 | Sir Richard Glazebrook - Heat - 1902 - 236 pages
...the focal length of a given convex lens ia 2 feet ? Draw a figure, approximately to scale, indicating the paths of the rays of light and the positions of the images formed, when an object is placed (a) at a distance of 6 feet, (b) at a distance of 1 foot from such a lens. 25.... | |
 | Daniel Evan Jones - Mathematical physics - 1914 - 374 pages
...of it : if the focal length of the lens is 8 in., find the position and magnitude of the image. 94. Draw figures, approximately to scale, showing the...inches from a convergent lens of 2 in. focal length. 95. An object is placed 8 in. from a convex lens, and its image is formed 24 in. from the lens on the... | |
 | James Powell Cocke Southall - Geometrical optics - 1918 - 638 pages
...a, and if its focal length in a liquid is b, show that the index of refraction of the liquid is 17. Draw figures, approximately to scale, showing the...when a luminous object is placed at a distance of (a) 1 inch, (6) 6 inches from a convex lens of focal length 2 inches. 18. An object is placed 8 inches... | |
 | 242 pages
...the focal length of a given convex lens is 2 feet ? Draw a figure, approximately to scale, indicating the paths of the rays of light and the positions of the images formed, when an object is placed (a) at a distance of 6 feet, (6) at a distance of 1 foot from such a lens. 25.... | |
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