How does radiation travel? Gamma rays travel like any other electromagnetic waves - cutting a fairly straight line through world. They can move through a vacuum, or through air or water. They can also cut through light elements like aluminum or most metals. Lead can cut down on gamma radiation, but it can't really stop it. One inch of lead will cut any amount of gamma radiation by half. Another inch will cut it by another half, and so on, and so on.
1 The most points are available at Tesco alliance stations (1 point for every Â£3 spent). 2  Elsewhere it's 1 point for every 2 litres of fuel. 3  Shell: The Shell Drivers Club and V-power Clubs offers shopping vouchers, Avios and other rewards. Elsewhere it's 1 point for every 2 litres of fuel. 2  Shell: The Shell Drivers Club and V-power Clubs offers shopping vouchers, Avios and other rewards. 3  V-power offers double points when cardholders buy the fuel of the same name but, as with BP, that's more expensive.
Esso. Fill your vehicle up at Esso and you can bump up your Clubcard point collection. At Esso Tesco Alliance forecourts (those with a Tesco shop) you get one point for every Â£3 spent on fuel. At all other Esso service stations that drops to one point for every two litres of fuel purchased.ut you can get more bang for your buck when exchanging those points with Clubcard Boost. These are limited time offers where your vouchers can be exchanged to use with Tescoâs partners for services worth up to four times the balance of the vouchers.