Quiz on Convex Lenses

During a science experiment, Surya Kumar Yadav was asked to identify the focal point of a convex lens. What did SKY correctly identify as the focal point?

• The edge of the lens

• The center of the lens

• The focal point

• The back of the lens

Explain how the focal point of a convex lens is related to its curvature?

• The focal point of a convex lens is determined by its color

• The focal point of a convex lens is determined by its weight

• The focal point of a convex lens is determined by its size

• The curvature of a convex lens determines the focal point.

How is an image formed by a convex lens?

• Real and upright

• Real and inverted

• 
• Virtual and inverted

Describe the difference between a real and virtual image formed by a convex lens?

• Real image can never be projected onto a screen, while virtual image can always be projected onto a screen.

• Real image is formed by apparent convergence of light rays, while virtual image is formed by actual convergence of light rays.

• Real image is formed by actual convergence of light rays, while virtual image is formed by apparent convergence of light rays.

• Real image is always smaller in size than the object, while virtual image is always larger in size than the object.

Divyansh and Kohli are conducting an experiment to understand how the magnification of a convex lens is related to the object distance. They have four options to choose from:

• No relationship

• Exponential relationship

• Direct relationship

• Inverse relationship

What are some applications of convex lenses?

• All of the above

• Can only be used in telescopes

• None of the above

• Only used for decoration

Discuss the use of convex lenses in cameras and magnifying glasses.

• Convex lenses are used to reduce the amount of light in cameras

• Convex lenses are used to decrease the magnification in magnifying glasses

• Convex lenses are used to focus light and create clear images in cameras, and to magnify and focus light in magnifying glasses.

• Convex lenses are used to create blurry images in cameras

During a science experiment, Yashash was asked to explain the principle behind the working of a convex lens. But he could not do it as he was busy in chatting so you help him by answering .What is the principle behind the working of a convex lens?

• The principle behind the working of a convex lens is based on the refraction of light

• The principle behind the working of a convex lens is based on the reflection of light

• The principle behind the working of a convex lens is based on the diffraction of light

• The principle behind the working of a convex lens is based on the dispersion of light

Discuss the role of convex lenses in correcting vision problems for students Ronaldo, Kohli, SKY, and Jadeja.

• Convex lenses are used to correct nearsightedness

• Convex lenses are used to correct farsightedness

• Convex lenses are used to correct astigmatism

• Convex lenses are used to correct presbyopia

What happens to the focal point of a convex lens when the curvature increases?

• The focal point moves closer to the lens

• The focal point moves away from the lens

• The focal point remains unchanged

• The focal point becomes blurry