tympanic, or reading from the ear, is not the best way to check a temperature especially in young children and babies. The best way is rectal or under the arm. But to answer your question, in a child, you want to pull the ear lobe gently down and out. In and adult you want to pull the top of the ear up and back. This opens the ear canal and allows for the thermometer to get an accurate reading.
You put the thermometer in what you want to get the temperature from. If you want to measure body temperature, the rectum would be the best way to get an accurate reading with an old school thermometer. There are however new thermometers which are as effective in an ear.
If you are referring to using a surface thermometer, no.
disposable thermometers
The thermometer's reading of the point the liquid boils may not be accurate.
disposable thermometers
place on forehead for 4 minuites and you should get a accurate reading.
There is an ear thermometer?
A thermometer which utilizes a gas(vapor) to react to temperature changes for an accurate reading. (Instead of a hazardous material such as a mercury filled thermometer.)
to get an accurate reading of the liquid inside the beaker, the thermometer should not rest on the bottom of the beaker.
It's called a rectal thermometer. It gives a slightly more accurate reading than when put under your tongue or in your armpit.
Generally, you must leave a thermometer in your mouth approximately three minutes to get an accurate reading.
An ear thermometer should be placed carefully in an ear to measure the temperature. The temperature is then taken by an infrared mechanism in the thermometer.