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Nov 15, 2013 (4 years and 8 months ago)

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Physics 145

Introduction to Experimental Physics I

Instructor:
Karine

Chesnel

Office: N319 ESC

Tel: 801
-

422
-
5687

kchesnel@byu.edu

Office hours: on appointment

Class website:

http://www.physics.byu.edu/faculty/chesnel/physics145.aspx

Lab space availability

Wednesday 3

6 pm:

3 seats

Thursday 8

11 am:

1 seat

Thursday 11 am

2 pm:

1 seat

Thursday 3

6 pm:

-

Friday 11am

2 pm:

9 seats

Friday 2

5 pm:

-

1.
Prepare by reading the introduction material

2.
Answer quiz questions (within the first half hour) and
submit the sheet to your TA

3.
Proceed to the experiments: L2.1, L2.2, etc…

4.
Write a report of your findings for each experiment,
in your lab notebook (individual reports)

Lab
3

Interference

Diffraction

Interferences

Constructive

interference

Destructive

interference

Difference in optical path:

=
𝑑𝑠𝑖𝑛𝜃

=
𝑛
𝑛
+
1
2

l

l

constructive

destructive

Interferences & diffraction

Single slit

Diffraction pattern

Interferences & diffraction

Double slits

Diffraction pattern

Interferences & diffraction

Double slits

Peak separation

Slits separation

Envelope width

(separation between maxima)

Slits width

Interferences & diffraction

Double slits

Single slit

Interferences & diffraction

Double slits

Five slits

Interferences & diffraction

Grating

Zero order

first order

first order

second order

second order

Lab
3: Interference & Diffraction

A.
Alignment

L3.
1:
Vertical alignment (posts)

L3.2: Horizontal alignment (bench)

L3.3: Lenses positioning (collimation, focalization)

L3.4: Source

eyepiece alignment

B
. Qualitative observations

L3.5
:
Green filter

Single slit, varying size

L3.6: Try different filters, optimize color

L3.7
:
Double
-
slits, varying spacing

L3.8
:
Grating: compare intensity, resolution

C
. Quantitative measurement

L3.9
:
Use diffraction pattern from the grating

to determine the wavelength of the light

Lab 2: spectroscopy