Refraction flash cards

Where is the image formed when object is at 2F₁?

• At F₁

• At 2F₂

• At infinity

• At F₂

How is a glass slab different from a prism in terms of refraction?

• A glass slab causes deviation and dispersion, while a prism causes lateral displacement.

• A glass slab causes no refraction, while a prism causes significant refraction.

• A glass slab causes lateral displacement, while a prism causes deviation and dispersion.

• A glass slab and a prism both cause the same type of refraction.

What is the sign convention for lenses (New Cartesian Sign Convention)?

• Negative: Distances measured along the direction of light. Positive: Distances measured opposite to incident light.

• Negative: Distances measured opposite to incident light. Positive: Distances measured along the direction of light.

• Negative: All distances are considered positive regardless of direction.

• Positive: Distances are always measured from the lens to the object.

Where is the image formed when object is at infinity in a concave lens?

• At focus (F₁)

• At the center of curvature (C)

• At infinity

• At the optical center

What is refraction of light?

• Bending of light as it passes from one transparent medium to another due to change in speed.

• Reflection of light when it hits a surface.

• Absorption of light by a material.

• Scattering of light in different directions.

If angle of incidence = 0°, what happens during refraction?

• Light bends at a sharp angle.

• No bending; light passes straight.

• Light reflects back into the medium.

• Light disperses into a spectrum.

Why does a pencil appear bent in water?

• Because of the color of the water.

• Due to refraction; light bends at the water-air interface.

• Because the pencil is made of wood.

• Due to the angle of the pencil.

What is the image formed when object is beyond 2F₁?

• At F₂

• Between F₂ and 2F₂

• At 2F₂

• Beyond 2F₂

What is lateral displacement?

• The angle at which light enters a medium.

• The distance light travels in a vacuum.

• The perpendicular distance between the incident and emergent ray when light passes through a slab.

• The change in speed of light as it enters a different medium.

What is the focus (F) of a lens?

• The point where rays parallel to the principal axis converge (convex) or appear to diverge (concave) after refraction.

• The distance from the lens to the object being viewed.

• The point where light rays are absorbed by the lens material.

• The angle at which light enters the lens.