Lens and Mirrors Flashcard

Front

What is the focal length of a concave lens?

Back

The focal length of a concave lens is negative, indicating that it diverges light rays.

Front

What characteristics does an image have when an object is placed beyond 2F in a convex lens?

Back

The image is real, inverted, smaller than the object, and located on the opposite side of the lens.

Front

How do you calculate the height of an image formed by a lens?

Back

The height of the image can be calculated using the magnification formula: Magnification (m) = Height of image (h') / Height of object (h).

Front

What are the characteristics of an image formed by a convex mirror?

Back

The image is virtual, upright, smaller than the object, and located behind the mirror.

Front

What is the formula for the lens maker's equation?

Back

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 difference between real and virtual images?

Back

Real images can be projected on a screen and are formed on the opposite side of the lens from the object, while virtual images cannot be projected and are formed on the same side as the object.

Front

What happens to the image distance when the object is moved closer to a convex lens?

Back

As the object moves closer to a convex lens, the image distance increases, and the image may become larger and inverted.

Front

What is the significance of the sign convention in lens formulas?

Back

The sign convention helps determine the nature of the image (real or virtual) and its orientation (upright or inverted) based on the distances involved.

Front

How does the height of the image relate to the object height in lens systems?

Back

The height of the image is proportional to the height of the object, scaled by the magnification factor.

Front

What is the focal length of a convex lens?

Back

The focal length of a convex lens is positive, indicating that it converges light rays.