What are the 2 properties of concave lens and convex lens ?
Class 7th
Answers
Answer:
The image from a concave lens is always virtual and erect. While the real and inverted image is formed from a convex lens. However, in case the object is very near to the lens then the resultant image is virtual, erect, and magnified.
Answer:
Key Differences Between Concave and Convex lens
1. The key factor of differentiation between a concave and a convex lens is that a concave lens diverges the light rays that travel parallel to its principal axis. As against a convex lens, converges the light rays that incident on it along the direction of its principal axis.
2. Due to the nature of the lens, the incident light rays either converges or diverges after passing through it. Thus, the concave lens is also known as a diverging lens while the convex lens is known as a converging lens.
3. These two lenses are also differentiated on the basis of shape possessed by them. A concave lens exhibits a cave-like structure from the outside as it has a thinner middle portion and thick edges. However, in the convex lens, the edges are comparatively thinner than the center of the lens.
4. The polarity of the focal length is negative in the case of the concave lens while it is positive for a convex lens. Due to this the diverging lens sometimes referred as a negative lens while the converging one is referred as a positive lens.
5. The image from a concave lens is always virtual and erect. While the real and inverted image is formed from a convex lens. However, in case the object is very near to the lens then the resultant image is virtual, erect, and magnified.
6. Lenses are used for the correction of issues related to vision. The concave lenses are used to cure myopia while the convex lens corrects hypermetropia.
7. Convex lenses hold magnifying abilities thus are generally used in the lens of microscope and telescope, also, the human eye lens is concave in nature. But, a convex lens is used in lasers, flashlights of vehicles as well as peepholes of doors.
8. In the case of a concave lens, the body or object near it appears to be present at distant and is smaller than the actual one. However, when a body is present in front of a convex lens then it appears in a way that it is present nearer and is of larger dimensions than the original body.