30 Questions
What is the point called where the centre of the reflecting surface of a spherical mirror lies?
Pole
What is the centre of curvature of a concave mirror located?
In front of the mirror
What is the radius of curvature of a spherical mirror?
The radius of the sphere of which the mirror is a part
What is the relation between the distance PC and the radius of curvature?
PC is equal to the radius of curvature
What is the shape of a spoon when it is curved inwards?
Concave
What is the purpose of recognising the terms concave and convex in the context of spherical mirrors?
To understand the meaning of a few terms before moving further on spherical mirrors
What is the point called where the reflected rays intersect, on the principal axis of a concave mirror?
Principal focus
What is the relationship between the radius of curvature and the focal length of a spherical mirror?
R = 2f
What is the diameter of the reflecting surface of a spherical mirror called?
Aperture
Where do the reflected rays appear to come from, when parallel rays are incident on a convex mirror?
A point on the principal axis
What is the condition for the spherical mirrors being considered in this discussion?
Aperture is much smaller than its radius of curvature
What is the symbol used to represent the focal length of a spherical mirror?
f
What is the path of a ray of light from the object, parallel to the principal axis, after refraction from a convex lens?
It passes through the principal focus on the other side of the lens
A ray of light passes through the principal focus of a convex lens. What is the direction of the emergent ray?
It emerges parallel to the principal axis
What is the path of a ray of light passing through the optical centre of a lens?
It emerges without any deviation
In a concave lens, where is the principal focus located?
On the same side of the lens as the object
What is the direction of a ray of light that appears to meet at the principal focus of a concave lens after refraction?
It emerges parallel to the principal axis
What is the purpose of constructing ray diagrams for lenses?
To study the image formation in the lens
What is the primary purpose of placing a burning candle on one side of the lens in the activity?
To observe the virtual image of the candle on the other side of the lens
What happens to the size of the image when the candle is placed too far away from the lens?
The image size decreases
What can be represented using ray diagrams?
The position and relative size of the image formed by lenses
What is the nature of the image formed by a concave lens when the object is placed at infinity?
Virtual and erect
What can be concluded from the activity?
A concave lens will always give a virtual, erect and diminished image
What is the position of the image when the object is placed between infinity and the optical centre of the lens?
Between the focus F1 and the optical centre O
What is the main reason the coin appears to be raised above its actual position in Activity 10.8?
The refraction of light causes the coin to appear raised
In Activity 10.9, what is the purpose of placing the glass slab at an angle to the line?
To observe the effects of refraction on a straight line
What is the primary difference between the observations in Activity 10.9 when the glass slab is placed at an angle versus normal to the line?
The line appears bent at an angle but not when normal
In Activity 10.10, what is the purpose of fixing the sheet of paper to a drawing board?
To prevent the paper from moving during the experiment
What is the underlying principle behind the observations in Activities 10.8, 10.9, and 10.10?
The principle of refraction of light
What is the common outcome of the three activities (10.8, 10.9, and 10.10)?
The refraction of light, causing objects to appear distorted or raised
Learn about the basics of spherical mirrors, including concave and convex mirrors, and their characteristics. Understand how to identify and differentiate between them. A must-know for physics students!
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