Front

What happens when an object is placed at the focal point of a convex lens?

Back

There is no image produced.

Front

What is the relationship between optical density and the speed of light in different media?

Back

If medium X is optically less dense than medium Y, then light travels faster in medium X than in medium Y.

Front

What causes a drinking straw to appear bent when partially submerged in water?

Back

Refraction of light.

Front

How does doubling the area of a loop affect the magnetic flux if the magnetic field strength remains constant?

Back

The magnetic flux doubles.

Front

What is the behavior of a reflected ray when an incident ray passes through the focal point of a concave mirror?

Back

The reflected ray will be parallel to the principal axis.

Front

Define refraction.

Back

Refraction is the bending of light as it passes from one medium to another due to a change in its speed.

Front

What is Snell's Law?

Back

Snell's Law relates the angles of incidence and refraction to the indices of refraction of the two media.

Front

What is the formula for calculating magnetic flux?

Back

Magnetic flux (Φ) = B * A * cos(θ), where B is the magnetic field strength, A is the area, and θ is the angle between the field lines and the normal to the surface.

Front

What is the principle of superposition in wave physics?

Back

The principle of superposition states that when two or more waves overlap, the resultant wave is the sum of the individual waves.

Front

What is the difference between a real image and a virtual image?

Back

A real image can be projected on a screen and is formed by converging light rays, while a virtual image cannot be projected and is formed by diverging light rays.