A6703sc images

May 30, 2016By Bob BerryGeneral

There are a couple of images below taken with an A6703sc, both images are of a £2 coin, one with a 50mm lens, the other with a 1X microscope lens.

Why do some things glow when they are hot?

May 25, 2016By Bob BerryGeneral

Objects begin to glow when they become incandescent. Incandescence is a name given when objects begin emitting thermal energy in the visible part of the electromagnetic spectrum. This usually starts at about 500-525 degrees C. As an object heats up two things happen. Firstly they emit more radiated energy. Secondly, the peak wavelength of the … Read More

Building thermography in the rain

May 20, 2016By Bob BerryBuilding thermography

Can you carry out thermography surveys of buildings when it is raining? I have often been asked this. If it rains, the external surfaces can be wet/damp. This causes evaporative cooling over the damp surface and this cooling can mask problems. For this reason it is best not to conduct surveys in the rain. Reports … Read More

Will a silvered mirror have a high or low emissivity?

May 15, 2016By Bob BerryGeneral

This is an excellent question. A silvered mirror is a piece of glass, coated on one side with a very reflective metal. The silvered side with have an extremely low emissivity, but the other side is essentially glass, so its emissivity will be the emissivity for the glass, which should be high. Sometimes people use … Read More

What is temperature?

May 13, 2016By Bob BerryGeneral

  An excellent question, the concept of temperature relates to the average speed of molecular movement. It is a relative measurement, letting us know simply that one object is hotter (or colder) than another object. The principle of temperature measurement is essentially linked to the so-called “Zeroth Law of Thermodynamics”. This curiously named law is … Read More