The optical recording of the object wave formed by the resulting interference pattern of two mutually coherent component light beams. In the holographic process, a coherent beam first is split into two component beams, one of which irradiates the object, the second of which irradiates a recording medium.
Make sure to preheat the oven to the correct temperature (220Â°C / 200Â°C fan oven / gas mark 6) before putting your scones in. The 15 minute guideline starts from the point at which you put your scones in a preheated oven. It may also take a bit longer to bake them through in a standard (non-fan) or gas oven. You will also need to extend the time if youâre baking more than 12 tea-time or 24 canapÃ© scones in the oven at the same time.
1 For the pastry: Sift 300g plain flour with a pinch salt and 150g caster sugar. 2  Add beaten egg and butter and mix to a dough. 3  You may need to add a very small amount of water. 4  Leave in a cool place for 1 hour. 5  Alternatively, if youâre in a rush you can put it in the freezer for 10 minutes. Add beaten egg and butter and mix to a dough. 2  You may need to add a very small amount of water. 3  Leave in a cool place for 1 hour. 4  Alternatively, if youâre in a rush you can put it in the freezer for 10 minutes. 5  After cooling, roll out pastry and place into 2 greased tins (loose based tins are best).