B. It can form a virtual image. C. It always makes objects appear smaller. D. It can focus light. 相关知识点: 试题来源: 解析 C。凹面镜可以形成实像和虚像,也能聚焦光线,选项 A、B、D 正确;凹面镜不一定总是使物体看起来更小,有时也能放大物体,所以选项 C 错误。反馈 收藏 ...
Why is a concave mirror called converging mirror ? 02:04 Among the different colours of white light, the colour, which undergo... 04:09 Give two uses of uv rays. 03:45 What is a rainbow? 06:05 Define first principal focal length of a convex lens. 01:32 A light ray travels from ...
The flashlight is provided with concave mirror.WITTMANN,PETERWITTMANN,JOSEF
An object is placed 13 cm in front of a concave mirror with a focal length of 60 cm. What is the magnification? An object 10.0 cm in height is placed 37.0 cm in front of a concave mirror of focal length 18.5 cm What is the height of ...
SB,19) a man uses a concave mirror for shaving . He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 time enlarged.Find the focal length of the mirror. Solution ocal length, f= ? Object distance, u=-25 cm...
Focal length of concave mirror is _ always positive always negative zero Concave Mirror: A concave mirror is a converging mirror. Dependent on the location of an object in front of the concave mirror, the image can be real or imaginary. If the object is closer to the mirror than ...
Question. An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of20 cm towards the mirror, the displacement of the image will be b(a)30 cm away from the mirror(b)36 cm away from the mirror(c) 30 ...
2) The mirror is convex. 镜子呈凸面。3) concave mirror 凹镜,凹面镜4) concave mirror 凹面镜 1. Using a concave mirror with curve surface,realized the fabrication of the STM optical fiber. 以普通的单模石英光纤为材料,改进熔融拉锥装置,利用有旋转曲面的凹面镜,实现了制作扫描隧道显微镜光纤...
So does a concave mirror magnify the object? By anon247581 — On Feb 14, 2012 I'm confused about the difference between convex and concave given your examples. You say that "A good example of a concave object would be a bowl or plate." Yet later, you name another convex item: the...
Answer to: There is a 12 mm high object that is 10 cm from a concave mirror with a focal length of 17 cm. (a) Where (B) how high, and (C) what type...