06-26-2025, 01:46 PM
Below is a comprehensive list of short-answer type questions, including application-level questions, based on Chapter 2: Lenses from the Kerala 10th Standard Physics curriculum. Each question is designed to test key concepts, definitions, and problem-solving skills, with detailed answers for clarity.
Name three applications of lenses in daily life.
Answer: Spectacles, cameras, and telescopes.
What is the principal focus of a convex lens?
Answer: The principal focus of a convex lens is the point on the optic axis where light rays parallel to the axis converge after refraction. It is real.
Why is the principal focus of a concave lens considered virtual?
Answer: The principal focus of a concave lens is virtual because parallel rays diverge after refraction and appear to originate from a point on the same side of the lens.
What happens to the image when an object is placed between the focus and the optic centre of a convex lens?
Answer: The image is formed on the same side as the object, is magnified, erect, and virtual.
State one rule for drawing a ray diagram for a convex lens.
Answer: A ray parallel to the optic axis passes through the principal focus on the opposite side after
refraction.
10th Physics Chapter 2 Lenses Short notes
Kerala SSLC Physics Chapter 2 Lenses- Important Short answer questions.pdf (Size: 84.72 KB / Downloads: 7)
Name three applications of lenses in daily life.
Answer: Spectacles, cameras, and telescopes.
What is the principal focus of a convex lens?
Answer: The principal focus of a convex lens is the point on the optic axis where light rays parallel to the axis converge after refraction. It is real.
Why is the principal focus of a concave lens considered virtual?
Answer: The principal focus of a concave lens is virtual because parallel rays diverge after refraction and appear to originate from a point on the same side of the lens.
What happens to the image when an object is placed between the focus and the optic centre of a convex lens?
Answer: The image is formed on the same side as the object, is magnified, erect, and virtual.
State one rule for drawing a ray diagram for a convex lens.
Answer: A ray parallel to the optic axis passes through the principal focus on the opposite side after
refraction.
10th Physics Chapter 2 Lenses Short notes
Kerala SSLC Physics Chapter 2 Lenses- Important Short answer questions.pdf (Size: 84.72 KB / Downloads: 7)