Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 68
eriment No. 54. Converging sunlight. Open the slit inyour darkened room to its full size and allow the sunlight tofall on the concave (curved-in) side of your curved mirror.Make a dust. Is the sunlight converged to a point and does itdiverge beyond this point (Fig. 97) ? This point is the focus… … Experiment No. 56. Picture of the sun.Remove the shutter,stand the mirror onthe table in the sun-light, and focus thesunlight on a strip ofpaper inch wide(Fig. 99). Is the pic-ture of the sun roundand very bright? Experiment No. 57. Fig* 97, You see a brilliant focus in dusty airThe focus is very…
Light · Scientific recreations
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