17.1 – Measuring the Wavelength of Light (Leaving Cert Physics): Quizzes

To split light into different orders

Never look directly at the laser beam

Spacing between adjacent slits

Reduces percentage errors in measurement

Distance between corresponding images

$\lambda = \frac{d \sin \theta}{n}$

$\tan \theta = \frac{Y}{2D}$

First, second, and third order

View the scale directly from above

Perpendicular to the laser light

Monochromatic light (laser)

Larger $D$ and more lines per mm

300 lines per mm