Question

light chapter ques ans​

Answer 1

HERE THERE'S SOME Q/A OF LIGHT

QUESTION 1

Define the principal focus of a concave mirror.Answer:The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.

Define the principal focus of a concave mirror.Answer:The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.Question 2

Define the principal focus of a concave mirror.Answer:The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.Question 2The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

Define the principal focus of a concave mirror.Answer:The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.Question 2The radius of curvature of a spherical mirror is 20 cm. What is its focal length?Answer:

Define the principal focus of a concave mirror.Answer:The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.Question 2The radius of curvature of a spherical mirror is 20 cm. What is its focal length?Answer:Focal length = 12 x Radius of curvature = 12 x 20 cm = 10 cm