Question 1: A diffraction grating is of width 5 cm and produces a deviation of  300 in the second-order with the light of wavelength 580 nm. Find the slit spacing.

Magnifier on iPhone

The precision magnifier (lens diameter 7/8"/21 mm) provides high-resolution definition for the finest of details, thanks to its 10X magnification and 2 white LEDs.

This set of magnifiers brings together 3 of the most popular magnifiers in an optimal combination, so that you’re equipped for any situation:

Magnifier app

The frameless magnifier with a handle and 3X magnification enables holistic viewing of larger objects thanks to the especially large acrylic lens (diameter 90 mm/3 1/2") and 2 white LEDs.

The compact pocket magnifier has 5 functions in one gadget: a large lens with 2.5X magnification (lens diameter 1 1/4 x 1 1/2"/30 x 37 mm), a small lens with 10X magnification (diameter 5/8"/15 mm), a UV lamp, LED pocket torch and a pull-out ballpoint pen. Due to the compact design, it is ideal for travelling, e.g. when visit- ing fairs or for shopping.

A diffraction grating defines an optical component with a periodic structure that splits the light into various beams that travel in different directions. It is an alternative way to observe spectra other than a prism. Generally, when light is incident on the grating, the split light will have maxima at an angle θ.  The formula for diffraction grating is used to calculate the angle.