It seems that the section “Playing with Spherical Mirrors” is either missing or could not be located in the PDF.
However, based on the standard content of Class 7 Science NCERT book under this topic, I can prepare 10 one-word answer type questions with answers and explanations (as you requested).
Here they are:
Topic: Playing with Spherical Mirrors
Spherical mirrors are curved mirrors that can be either concave or convex. They form different types of images based on the position of the object.
1. Question: What is a mirror called whose reflecting surface is curved inwards?
Answer: Concave
Explanation: A concave mirror has its reflecting surface curved inwards like the inside of a spoon.
2. Question: What is a mirror called whose reflecting surface is curved outwards?
Answer: Convex
Explanation: A convex mirror has its reflecting surface curved outwards.
3. Question: Which type of mirror is used by dentists to see enlarged images of teeth?
Answer: Concave
Explanation: Concave mirrors form enlarged images and are used by dentists.
4. Question: Which type of mirror is used in vehicles as rearview mirrors?
Answer: Convex
Explanation: Convex mirrors give a wider field of view and are used as rearview mirrors.
5. Question: What kind of image does a concave mirror form when the object is very close?
Answer: Virtual
Explanation: When the object is very close to a concave mirror, it forms a virtual and enlarged image.
6. Question: What is the shape of the surface of a convex mirror?
Answer: Outward
Explanation: The reflecting surface of a convex mirror bulges outward.
7. Question: What is the point called where parallel rays meet after reflection in a concave mirror?
Answer: Focus
Explanation: In a concave mirror, parallel rays converge at a point called the focus.
8. Question: Which mirror always forms a virtual and diminished image?
Answer: Convex
Explanation: Convex mirrors always form virtual, erect, and diminished images.
9. Question: What is the center of the sphere from which a spherical mirror is made called?
Answer: Centre of curvature
Explanation: The centre of the sphere of which the mirror is a part is called the centre of curvature.
10. Question: What is the line passing through the centre of curvature and pole of a spherical mirror called?
Answer: Principal axis
Explanation: The straight line passing through the centre of curvature and the pole is called the principal axis.
If you want, I can now make a neat student worksheet PDF of all your question sets from different topics along with an answer key.
Shall I proceed?
