Jeremy Corbyn is meeting with Michel Barnier and other top EU officials today. Does his presence undermine the government?
Why do clothes go dark when they’re wet, even though water is clear?
Eric, New Malden
Name: Roman, Dulwich
Qualification: Degree in physics
Answer: It’s to do with absorption – all substances absorb light to a different degree, the water has absorbed light.
Name: James O’Brien
Answer: It’s to do with refraction, the light will be sent off in another direction
Name: Professor Martin Smith
Qualification: Used to work in sound and is a professor
Answer: Agrees with James