Experiment 1: reversibility, Purpose, Procedure – PASCO OS-8536 OPTICS TABLE User Manual
Page 7: Equipment needed, Figure 1.2, Angle of incidence, Angle of refraction, Figure 1.1
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012-06557A
Optics Table
Experiment 1: Reversibility
Purpose
The purpose is to determine the relationship that exists
between the angle of incidence and the angle of refrac-
tion for light passing from air into a more optically dense
medium (the Cylindrical Lens). The second purpose is to
determine whether the same relationship holds between
the angles of incidence and refraction for light passing
out of a more optically dense medium back into air. That
is to say, if the light is traveling in the opposite direction
through the lens, is the law of refraction the same or
different? In this experiment, you will find the answer to
this question.
Procedure
Mount the Ray Table Base and the Light Source on the
Optics Bench.
1. Put the Ray Table on the base with the Cartesian grid
(mm SCALE) facing up. Turn the Ray Table so the 0
(zero) degree line points to the Light Source.
EQUIPMENT NEEDED
– Cylindrical Lens
– Ray Table
– Ray Table Base
– Optics Bench
– Light Source
2. Put the Light Source on its bracket so that the mul-
tiple slits are facing the Ray Table. Position the Light
Source so it is about two centimeters from the edge of
the Ray Table. Adjust the slit mask on the front of the
Light Source so the Light Source projects
one ray of light across the middle of the
top surface of the Ray Table.
3. For the first trial, put the Cylindrical Lens
on the Ray Table so the flat surface of the
lens faces the Light Source and the edge
of the lens is on the 90 (ninety) degree
line with the lens exactly centered on the
0 (zero) degree line.
See Figure 1.2
PASCO
scientific
POWER SUPPL
Y JACK
12V @ 800mA
OS
-85
17
LIGHT
SOURCE
COLO
R
TO REPLACE BULB SEE
INSTR
UCTION MANUAL.
BULB
: 12V
10W G-4
DO NOT
TO
UCH BULB
WI
TH
FINGERS.
DISCONNECT
PO
WE
R
BEFORE CHAN
GING BULB
.
TO REMOVE LIGHT
SOURCE
GENTL
Y SPREAD BRACKET
.
5
3
1
RA
Y
SLITS
BA
SIC
O
PT
IC
S
Figure 1.2
80
70
60
50
60
70
80
20
30
40
1
0
0
10
40
3
0
20
70
60
50
80
90
80
50
60
70
20
30
40
1
0
0
1
0
4
0
30
20
50
90
RAY TABLE
mm SCALE
10
20
30
40
10
10
10
20
20
20
30
30
30
40
40
40
80
70
60
50
60
70
80
20
30
40
10
0
1
0
40
30
20
70
60
50
80
90
80
50
60
70
20
30
40
10
0
10
40
30
2
0
5
0
90
RAY T
ABLE
mm S
CALE
10
20
30
40
10
10
10
20
20
20
30
30
30
40
40
40
Angle of
Incidence
1
Angle of
Refraction
1
Angle of
Refraction
2
Angle of
Incidence
2
Figure 1.1