Optics: Mirrors and Lenses Concepts

The video tutorial covers the basics of spherical mirrors, including concave and convex mirrors, their properties, and how they reflect light. It explains key terms like center of curvature, pole, and principal axis. The video also details the rules for image formation by concave and convex mirrors, the mirror formula, and sign conventions. Additionally, it discusses the power of lenses and how it is calculated. The tutorial concludes with a summary of the main points.

What is a concave mirror?

• A mirror with a flat surface

• A mirror with a bulging out surface

• A mirror with a bent in surface

• A mirror with a transparent surface

What is the principal axis of a spherical mirror?

• The line that divides the mirror into two equal parts

• The line perpendicular to the mirror surface

• The line parallel to the mirror surface

• The line passing through the center of curvature and pole

Where is the image formed when an object is placed at the focus of a concave mirror?

• Behind the mirror

• At the center of curvature

• At infinity

• At the pole

What type of image is always formed by a convex mirror?

• Real and erect

• Virtual and inverted

• Virtual and erect

• Real and inverted

Which type of mirror is used as a rear-view mirror in vehicles?

• Concave mirror

• Convex mirror

• Plane mirror

• Parabolic mirror

What is the mirror formula?

• 1/V - 1/U = 1/F

• 1/V + 1/U = 1/F

• V + U = F

• V - U = F

What does a positive magnification indicate?

• The image is smaller than the object

• The image is virtual and erect

• The image is larger than the object

• The image is real and inverted

What is the power of a lens defined as?

• The thickness of the lens

• The diameter of the lens

• The reciprocal of its focal length in meters

• The focal length in meters

What happens to light rays when they pass through a convex lens?

• They refract

• They diverge

• They converge

• They reflect

What is the SI unit of the power of a lens?

• Diopter

• Watt

• Meter

• Joule