Convex Lenses (magnification) in Optics Flashcard

Front

What is the lens formula for a convex lens?

Back

Front

What happens to the image distance (v) when an object is placed 25 cm from a convex lens with a focal length of 10 cm?

Back

The image distance (v) is 16.67 cm.

Front

What is the magnification (M) when an object is placed at the focal length (F) of a convex lens?

Back

The magnification (M) is infinite.

Front

Where is the image formed when an object is placed at the focal point of a convex lens?

Back

The image is formed at infinity.

Front

Where is the image formed when an object is placed at twice the focal length (2F) from a convex lens?

Back

The image is formed at 2F on the opposite side.

Front

What happens to the focal length of a convex lens if it is submerged in water?

Back

The focal length increases.

Front

Define magnification in the context of lenses.

Back

Front

What is the relationship between object distance (u), image distance (v), and focal length (f) in a convex lens?

Back

Front

If the object distance (u) is negative, what does it indicate?

Back

A negative object distance indicates that the object is placed on the same side as the incoming light (real object).

Front

What type of image is formed by a convex lens when the object is beyond 2F?

Back

The image is real, inverted, and smaller than the object.