Lenses Illuminated: The Science of Convex and Concave Light Bending

The video tutorial introduces convex and concave lenses, explaining their structure and how they bend light through refraction. Convex lenses converge light rays to form real images, while concave lenses diverge rays to create virtual images. The tutorial also covers the concept of focal length and how it affects image size.

What is the process called when light changes direction as it passes through a lens?

• Refraction

• Diffraction

• Dispersion

• Reflection

Which type of lens is thicker in the middle and thinner at the edges?

• Convex lens

• Flat lens

• Cylindrical lens

• Concave lens

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

• They reflect

• They converge

• They scatter

• They diverge

Where do light rays meet after passing through a convex lens?

• At the lens surface

• At the focal point

• Behind the lens

• In front of the object

How do light rays behave when they pass through a concave lens?

• They reflect

• They refract

• They converge

• They diverge

What type of image is formed by a concave lens?

• Inverted image

• Virtual image

• Magnified image

• Real image

What is the term for the distance from the center of a lens to its focal point?

• Lens radius

• Image distance

• Optical distance

• Focal length

How does the focal length affect the size of the image produced by a lens?

• It makes the image smaller

• It affects the image size based on the object distance

• It determines if the image is real or virtual

• It makes the image larger

Which lens type is used to correct nearsightedness?

• Cylindrical lens

• Concave lens

• Convex lens

• Bifocal lens

What is the main difference in the way convex and concave lenses bend light?

• Convex lenses converge light, concave lenses diverge it

• Both lenses reflect light

• Convex lenses diverge light, concave lenses converge it

• Convex lenses reflect light, concave lenses refract it