Introduction to Optics

P.7E - Optics Vocabulary Intro

describe and predict image formation as a consequence of reflection from a plane mirror and refraction through a thin convex lens

Optics Key Terms

• Optics: The study on how light behaves

• Object: What you are actually looking at. 

• Image: What you THINK you see.

  (It can be enlarged, reduced, or moved.)

• Inverted: upside down (⬇)

• Upright: right side up ( ⬆ )

Plane Mirror: Virtual image: 

An image that is upright.

Multiple Choice

Virtual Images for plane mirrors are always

• upright (right side up)

• Inverted (upside down)

Multiple Choice

Virtual Images for plane mirrors are always appearing to come from

• in front of the mirror

• behind the mirror

Multiple Choice

What is the name of this incoming ray?

• Reflected ray

• Incident Ray

• Normal

Multiple Choice

What is the name of this outgoing ray?

• Reflected ray

• Incident Ray

• Normal

Multiple Choice

The angle of incidence (i) is always ______ to the angle of reflection (r).

• greater than

• less than

• equal

Multiple Choice

I= __

the angle I is always equal to the angle ____.

• I

• r

Multiple Choice

Do lenses Reflect(bounce) or refract (bend) light?

• reflect (bounce off)

• refract (bend)

Multiple Choice

True or False: Glass is denser than air.

• True

• False

Multiple Choice

When light that travels through the convex lens, Will its Speed increase or decrease?

• Increase

• Decrease

Multiple Choice

When all the light rays meet, we call this the ...

• focal (focus) point

• light rays

Multiple Choice

When light rays meet, (at a focal point) we say the lens is a

• convergent lens

• divergent lens

Convex Lens Virtual image: 

An image that is upright.

Convex Lens: Real Image:

an image that can be “projected” 

(on a screen or on paper),

***always inverted!***

Multiple Choice

Is this image Real or Virtual?

• Real, inverted

• Virtual, upright

Multiple Choice

Is this image Real or Virtual?

• Real, inverted

• Virtual, upright

Multiple Choice

Is this image Real or Virtual?

• Real, inverted

• Virtual, upright

Multiple Choice

Is this image Real or Virtual?

• Real, inverted

• Virtual, upright