Seeing the unseen by any means is called dowsing. When we are in a quandary and unable to understand something through the conscious mind, we need the answer intuitively that sent out by the subconscious mind. Our subconscious communicates well with three fingers – index, middle and thumb of our hand and gives the right answers. If we unite the chakras of index finger and thumb, a pulse can be sensed. If you can clearly sense that pulse it is an indication that your chakras are activated. This pulse is what moves the dowsing gadget in your hand to get the answers. This pulse comes from the subconscious. When neurons communicate with each other they send the required answer that is the ultimate goal of dowsing. You can become an experienced dowser with enough practice only and finally a time will come when you will be able to guess & answer with a mere gaze at someone. This indicates that body is a walking dowser itself. The concept has been discussed in detail in this video.