Lesson 14 mirrors & lenses part i

1. Working in pairs, students will match

scientific instruments to their

measurement. First two pairs to

correctly match all instruments earn the

“roller” chairs for the period.

2. Get your journal ready. Add one page of

guided notes to the next available page.

3. Time Limit: 8 minutes

D. Goldsberry 3/10/12

S8P5:

Students will explore the

wave nature of sound and

electromagnetic radiation.


a. Identify the characteristics of electromagnetic and

mechanical waves.

b. Describe how the behavior of light waves is

manipulated causing reflection, refraction

diffraction, and absorption).

c. Explain how the human eye sees objects and colors

in terms of wavelengths.

d. Describe how the behavior of waves is affected by

medium (such as air, water, solids).

e. Relate the properties of sound to everyday

experiences.

f. Diagram the parts of the wave and explain how the

parts are affected by changes in amplitude and pitch.


What is the difference

between a real image

and a virtual image?


Answer: Reflection

When a light ray hits a mirror, the light is

reflected off the shiny surface.

Which wave interaction does

a mirror demonstrate?


Flat surface

Produces virtual images– no

light rays pass through the image

Upright, same-sized image

http://www.geocities.com/CapeCanaveral/Hall/6645/pm-gif.htm





What image

is produced

by the

mirror?


1)To look at yourself in the mirror

2) To see around an angle – used in

periscopes

3) Overhead projectors

What uses can you think of?


Curves outward


What will the image of the plant look like in

a convex mirror?


Virtual image – rays never meet

Image is upright and smaller

Increase the field of view


1. Security in stores and factories – to

see around the corner

2.Side view mirrors on cars –

“Objects may be closer than they

appear”

What other uses can you think of for

convex mirrors?


Curves inward


Has a focal point -- light rays are all

reflected to pass through one point

Has a focal length – distance from

the center of the mirror to the focal

point


Lesson 14 mirrors & lenses part i

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Transcript of Lesson 14 mirrors & lenses part i