Question

first question
what is the relation between the focal length and the radius of curvature of a spherical mirror what will be the change in the focal length if the radius of curvature is doubled

question2
define principal focus of convex mirror and also draw a diagram to show the same

question 3
name the type of spherical mirror used by dentist .30. label the five soil Horizons in the given picture and explain them also on top

​Mera matlab tha ki sabse upar yah photo dekhe hai aapko question 3rd ka answer uske sath dena hai vah question 3rd ki picture hai jo sabse upar top photo hai question third ke liye hai

Answer 1

Answer:

F = R/2

f = 2R/2

f= R

Concave mirror

Answer 2

1) The focal length gets doubled if the radius of curvature of a spherical mirror is doubled.

This is because the radius of curvature of a spherical mirror is equal to the half of its focal length.

2) The principal focus of a convex mirror is the point on its principal axis from which all the incoming parallel rays appear to diverge after reflection.

Take reference from the attached image above.

3) Dentists use a concave mirror for examining the teeth of their patients.

A concave mirror shows a distinct and magnified image of their teeth for better examination.

Thank you! Hope I've been able to help you out.