NCERT Solutions for Class 7 Science Chapter 15
Important NCERT Questions
7th Chapter 15 Light
NCERT Books for Session 2020-2021
CBSE Board and State Board
Questions No: 7
State two differences between a convex and a concave lens.
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• A convex lens can make images which are enlarged or smaller or equal to the size of the object whereas concave lens can always make smaller image.
• A convex lens makes both real image and virtual images whereas a concave lens always makes a virtual image.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
Characteristics of the image formed by a plane mirror:
• Virtual and erect.
• Behind the mirror.
• Size of image is equal to size of object.
• Laterally inverted image (image of left side visible on right side).
• Distance of image behind the mirror is equal to distance of object in front of mirror.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/