Free Entry to a family fun day with activities for all ages to celebrate the International Year of Light. including Jelly baby wave machine, CD spectrometers and invisible test tubes. Talks include Dave Ansell's Light Show, Lisa's 'why on Earth would you want to do physics anyway' and George's Good Vibrations = how do waves work

http://www.eventbrite.co.uk/e/physicsfest-2015-essex-tickets-18828372168