Polarized sunglasses are designed to transmit only one polarization of light – the polarization with electric fields vertical – since glare arising from reflections on horizontal snow and water surfaces is preferentially polarized with horizontal electric fields. LCD displays such as the view screens on many digital cameras (and laptops, etc.) also emit polarized light. Examine the image on a digital camera screen as you rotate it through 90° while wearing polarizing sunglasses. Explain what you observe.