Light and Optics Review

Flashcards for Light and Optics Review

What happens to light during reflection?

Light bounces, changes speed, but not direction.

Why can't you see your reflection on paper?

Paper is rough, so light scatters in all directions.

What is an incident ray?

Light coming in.

What is a reflected ray?

Light reflecting.

If light hits a mirror at 30 degrees, what angle does it reflect at?

30 degrees

What is the Law of Reflection?

Angle of incidence = angle of reflection

When light is reflected, does it change speed, direction, or both?

Speed

If a 22 cm bottle of Coke is in front of a flat mirror, how tall is its image in the mirror?

22cm

What type of lens is a convex lens?

Converging

What type of lens is a concave lens?

Diverging

What is the point called where light rays converge in a convex lens?

Focal point

What type of image does a concave lens always have?

Upright, virtual, reduced

What type of lens is a magnifying glass?

Convex

What type of lens is used in a peephole?

Concave

What are the characteristics of an image when the object is beyond 2F in a convex lens?

Real, Inverted, Reduced

What are the characteristics of an image when the object is at 2F in a convex lens?

Real, Inverted, Reduced (or same size)

What are the characteristics of an image when the object is between F and 2F in a convex lens?

Real, Inverted, Magnified

If a coke can is actually 12cm tall, but when looked at in a lens it appears 24cm tall, what is the magnification of the lens?

M=2