Giáo án môn Vật lý 10 - Sự truyền của ánh sáng

SỰ TRUYỀN CỦA ÁNH SÁNG (P 31 01) Danh mục thiết bị: GSN 246 Bảng từ 1 POG 465 Hộp tạo tia, 6V 20 W 1 POG 461 Màn chắn 1 khe và 2 khe 1 POG 462 Màn chắn 3 khe và 5 khe 1 Dây dẫn 2 KAL 60/5A Nguồn điện 1 Tiến hành thí nghiệm: Use the ray box with the rectangular opening for parallel light, a parallel light beam is emitted. When diaphragm with one, two or three slits are applied,the same number of thin light beams, parallel to one another, are generated. These are called light rays. Turn around the ray box to produce divergent light, a divergent light beam is emitted. Insert diaphragm with three slits, divergent rays of light are created. SHADOW (P 31 02) Danh mục thiết bị: GSN 246 Bảng từ 1 POG 465 Hộp tạo tia, 6V 20 W 1 POG 355.01 Vật tạo bóng, bán cầu 1 POG 260.02 Mô hình thấu kính phẳng lõm 1 Dây dẫn 2 KAL 60/5A Nguồn điện 1 Tiến hành thí nghiệm: Use the ray box with the rectangular opening for divergent light Place the object for shadowing hemisphere in the divergent of light. Move the object further from the ray box The object closer to the light source, the shadow of the object become larger The object further from the light source, the shadow of the object becomes smaller LUNAR ECLIPSE (MODEL) (P 31 03) Danh mục thiết bị: GSN 246 Bảng từ 1 POG 465 Hộp tạo tia, 6V 20 W 2 POG 355.01 Vật tạo bóng, bán cầu 1 POG 355.02 Vật tạo bóng, hình trụ 1 Dây dẫn 4 KAL 60/5A Nguồn điện 1 Tiến hành thí nghiệm: Set up the two ray box and the object for shadowing hemisphere, representing the earth, according to the figure. In position 1 the moon (object for shadowinng, cylinder) creates a umbra and penumbra areas. In position 2 the moon enters the earth's penumbra area. The appearance of its shadow changes while there is practically no change in light intensity on the moon's surface as observed from the earth. In position 3 the moon is found entirely in the earth's umbra. There is a total lunar eclipse. In position 4 only a part of the moon is touched by the earth's umbra. This is termed a partial lunar eclipse. Since the orbits of the moon and earth lie at an angle of approximately 5° to each other, the earth's conic umbra does not fall on the moon during every orbit. The orbits of the earth and moon intersect at two nodes. A lunar eclipse takes place only when sun, earth and moon and one of the nodes are aligned. SOLAR ECLIPSE (MODEL) (P 31 04) Danh mục thiết bị: GSN 246 Bảng từ 1 POG 465 Hộp tạo tia, 6V 20 W 2 POG 355.01 Vật tạo bóng, bán cầu 1 POG 355.02 Vật tạo bóng, hình trụ 1 Dây dẫn 4 KAL 60/5A Nguồn điện 1 Tiến hành thí nghiệm: A solar eclipse is observed when the moon's shadow falls on the earth's surface. From the umbra area, always covering only a small part of the earth's surface, a total solar eclipse is observed, while a partial solar eclipse is observed in the penumbra area. Move the objec for shadowing hemisphere representing the earth so that the tip of the umbra does not quite fall on the surface. From the penumbra area a partial solar eclipse can be observed. This appears ring-shaped when the observation area and the centers of the sun and the moon are all approximately aligned.