Unpack the relationship between the frequency, speed and wavelength of a wave.
What, really, is a wavelength and how is it measured? In this STEM lab, high school students work with a laser and diffraction grating to produce a double slit interference pattern. With data they collect, and some math, they solve for the wavelength of a real laser.
Grade Range: 9-12
Duration: 60 to 90 Minutes
- Laser Blox
- Diffraction grating
- Ruler or meter stick
- Pen and paper
PS4.B – Electromagnetic Radiation
- Use mathematical representations to support a claim regarding the relationships between the frequency, wavelength and speed of waves traveling in various media.
Science and Engineering Practices
- Use mathematical representations of phenomena or design solutions to describe and/or support claims and/or explanations