Light Reflection and Refraction

What type of image is formed by a concave mirror when the object is placed between the focal point and the mirror?

• A virtual, upright, and enlarged image.

• A virtual, inverted, and reduced image.

• A real, upright, and enlarged image.

• A real, inverted, and reduced image.

How does a convex lens affect parallel rays of light?

• A convex lens reflects parallel rays of light back in the same direction.

• A convex lens diverges parallel rays of light away from each other.

• A convex lens converges parallel rays of light to a focal point.

• A convex lens has no effect on parallel rays of light.

What is the focal length of a concave lens?

• The focal length of a concave lens is positive.

• The focal length of a concave lens is negative.

• The focal length of a concave lens is zero.

• The focal length of a concave lens is infinite.

Describe one practical application of a convex mirror.

• Convex mirrors are used as side mirrors in vehicles to enhance visibility.

• Convex mirrors are used in microscopes to magnify small objects.

• Convex mirrors are used as rearview mirrors in vehicles to reduce glare.

• Convex mirrors are used in projectors to focus light onto a screen.

What type of image is produced by a convex lens when the object is beyond the focal point?

• Real and inverted image

• Virtual and upright image

• Virtual and inverted image

• Real and upright image

Explain how light behaves when it passes from air into water.

• Light speeds up and changes direction when entering water.

• Light reflects off the surface of the water without bending.

• Light bends and slows down when it passes from air into water.

• Light remains unchanged when passing from air to water.

What is the primary difference between a concave mirror and a convex mirror?

• Both concave and convex mirrors focus light in the same way.

• A concave mirror is flat while a convex mirror is curved.

• A concave mirror focuses light while a convex mirror diverges light.

• A concave mirror diverges light while a convex mirror focuses light.

In which type of lens is the focal point located on the same side as the object?

• Concave lens

• Plano-convex lens

• Biconcave lens

• Convex lens

What is the significance of the critical angle in refraction?

• The critical angle is the angle at which light is absorbed completely.

• The critical angle affects the speed of light in a vacuum.

• The critical angle is irrelevant in the context of optical fibers.

• The critical angle determines the threshold for total internal reflection in refraction.

How does the curvature of a lens affect its focal length?

• The greater the curvature of a lens, the shorter its focal length.

• A lens with less curvature always has a shorter focal length.

• Curvature has no effect on the focal length of a lens.

• The greater the curvature of a lens, the longer its focal length.