Morse code alphabet
: Click a letter, or tap the laser's red button to send a message.
Detector
Morse timing
Signal analyser
Play
Pause
Replay
Meter 1
Frequency
—
Wavelength
—
Speed
—
Intensity
—
Meter 2
Frequency
—
Wavelength
—
Speed
—
Intensity
—
Result recorded
Record result
Critical angle: 0.0°
Snell's Law
Missing term:
θ
1
θ
2
n
1
n
2
Snell's Law:
Substitution:
Rearrangement:
Answer:
650 nm
REFRACTION
Boundary
Prism
Fibre optic
Scarecrow explains
Instructions
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Signal settings:
Light settings:
Light colour:
Custom colour:
650 nm
Signal type:
Continuous
Pulse
Morse code mode:
On
Off
Fibre settings:
Fibre path:
Straight
Gentle curve
Tight bend
Fibre type:
Step-index
Graded-index
Fibre mode:
Single-mode
Multimode
Core refractive index:
1.80
Cladding refractive index:
1.30
Light type:
Ray
Wave
Pause
Laser type:
Single ray
Parallel rays
Refraction model:
Basic
Realistic
Medium settings:
Material 1:
Material 1 Refractive index
Prism settings:
Material 2:
Material 2 Refractive index
Add third material:
Yes
No
Material 3:
Material 3 Refractive index
Analysis:
Show normals:
On
Off
Show angles:
On
Off
Show light analyser:
On
Off
Show critical angle:
On
Off
Show acceptance cone:
On
Off
Show signal analyser:
On
Off
Add protractor:
On
Off
Experiments:
Experiment mode:
On
Off
1. Select independent variable:
Wavelength
Angle of incidence
Material 1
Material 2
Material 3
2. Set all variables to the desired values; once you have begun gathering data, you will only be able to change the selected independent variable.
3. Set the independent variable to the desired value then click the ‘Record result’ button. Once you have recorded a result, change the independent variable then record another, repeating until you have enough data.
Record result
4. Show results:
On
Off
5. Clear results:
Clear results
Snell's Law Mode:
On
Off
Apparent position:
On
Off
Scarecrow explains
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Placeholder text.
Experimental data
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Conditions
Table of results
Message
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