19 Problems Only Girls Who Wear Glasses Understand. The oils on your cheeks are your greatest enemy. 1. Picking out new glasses is stressful. Choosing The Perfect Pair is so important because the frames you pick will absolutely define you as a person until you get your next pair of glasses.
The observer effect is the effect whereby the observation of a physical phenomenon necessarily affects that phenomenon. In the context of quantum mechanics, the observer effect implies that a measurement of a physical observable of a system forces that system to randomly pick a particular value of that observable from many possible values.
The Doppler Effect. The Doppler Effect is a phenomenon in which the observed frequency of a source is less or more than the true frequency as a result of either the source or the observer or both moving. It takes it name from Christian Doppler who came up with this idea in 1842.