Optics Review

Front

What is the focal point in optics?

Back

The focal point is the point where parallel rays of light either converge or appear to diverge after passing through a lens or reflecting off a mirror.

Front

What is the formula to find the distance of the image in lens optics?

Back

The lens formula is 1/f = 1/v - 1/u, where f is the focal length, v is the image distance, and u is the object distance.

Front

What is the index of refraction?

Back

The index of refraction (n) is a dimensionless number that describes how fast light travels in a medium compared to its speed in a vacuum. It is calculated as n = sin(i)/sin(r), where i is the angle of incidence and r is the angle of refraction.

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 3.00 x 10^8 m/s.

Front

What is the focal length of a lens?

Back

The focal length is the distance from the lens to the focal point, where light rays converge.

Front

What is the principle axis in optics?

Back

The principle axis is an imaginary line that passes through the center of a lens or mirror and is perpendicular to its surface.

Front

What happens to light rays that pass through the focal point of a lens?

Back

Light rays that pass through the focal point of a lens will emerge as parallel rays on the other side.

Front

What is the relationship between object distance, image distance, and focal length in mirrors?

Back

In mirrors, the relationship is given by the mirror formula: 1/f = 1/v + 1/u, where f is the focal length, v is the image distance, and u is the object distance.

Front

What is total internal reflection?

Back

Total internal reflection occurs when a light ray traveling in a denser medium hits the boundary with a less dense medium at an angle greater than the critical angle, causing the light to reflect entirely back into the denser medium.

Front

What is a convex lens?

Back

A convex lens is a converging lens that is thicker in the center than at the edges, causing parallel rays of light to converge at a focal point.