Converging Mirror or Concave Mirror
Converging Mirror or Concave Mirror
Converging Mirror or Concave Mirror
Concave Mirror can be considered as a part of a sphere. Consider a hollow glass sphere and cut a piece of the sphere as shown in the figure. The cut off piece has two surfaces, one which is bulging out or convex surface and other is a hollow surface that is on the same side as the centre of the original sphere is called as concave surface.
If we polish the bulging surface or convex surface with silver and look at it from the hollow side or concave surface, we have a concave mirror. These mirrors, which are referred to as convergent mirrors, concentrate the light rays, coming parallel to the principal axis causing them to converge on to a point known as the focal point. Concave mirrors form real images that can be projected on to a screen if the object is farther away than the focal point. The image obtained is large if formed near the focal point or small if formed far away from the focal point. In both cases, the image is reversed. If we place the object closer than the focal point, the image is formed upright and large but virtual (i.e., it cannot be projected).
Reflection Through Concave Mirror :
When a narrow beam of light traveling parallel to the principal axis is incident on the reflecting surface of a concave mirror,as shown in the figure, each ray is reflected according to the laws of reflection and converge to a point F on the principal axis known as the focus. As the rays are converging after reflection the concave mirror is also called converging mirror.
USES OF CONCAVE MIRRORS:
Which of the following is known as converging mirror ? | |||
| Right Option : B | |||
| View Explanation | |||
A Person uses a mirror close to his face resulting in an enlarged, upright image. What type of mirror he must be using ? | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) Concave mirrors are commonly used in torches, search-lights and vehicles headlights to get powerful parallel beams of light. (b) Concave mirrors are used as shaving mirrors to see larger image of the face. (c) Convex mirrors are used as shaving mirrors to see larger image of the face.
| |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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Archit Segal
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
