We are all used to the behavior of objects under the action of gravity since we spend our lifetime in an unchanging gravity environment - a ball always rolls down a ramp; water always flows downward; a plumb line or a rod suspended rest vertically and so on. Inside the antigravity cottage; one will see that each of the phenomena mentioned manifests contrary to this! That is, a ball rolls ‘up’ a ramp, water flows ‘up’ a channel and a freely suspended rod rest at an angle without any support! And, all these happen without the aid of any kind force other than gravity. Does gravity inside this cottage reverse its direction? Well, this is what people popularly say at certain places elsewhere in the world where such cottages are a popular tourist attraction. But in reality, the answer is that the direction of gravity does NOT reverse inside the cottage (or for that matter in those tourist places) and all the counter-intuitive observations that you make are due to the brain that perceives ‘up’ and ‘down’ using certain cues from our surrounding. What we have done is to ‘mislead’ the brain by providing improper cues to interpret ‘up’ and ‘down’.
Anti-Gravity Room in the planetarium campus is built at 15 degrees inclination to the ground surface. Thus when ball rolls or water flows, what ‘appears’ to be uphill is effectively downhill.
The same cause underlies famous spots like Magnetic Hill (Gravity Hill) in Ladakh, Jammu & Kashmir, India or the visual illusion based tourist attraction site 'Mystery Spot' near Santa Cruz, California in United States.
UNUSUAL LEANING PENDULUM
Pendulums find their resting position with respect to gravity. Leaning Pendulum also does the same but appears to be leaning only because the walls are tilted corresponding to the inclined floor of the room.
FREE RIDE UPHILL
Objects on inclined surface tend to move downhill due to gravity. The trolley here appears to be moving uphill only because the room is built with an inclination and the rails are having a lesser inclination but in the opposite direction. As a result, the up and down of the rails are perceived to be reversed inside the room.
CLOCK TAKING YOU BACK IN TIME?
The clock mechanism is reversed by adding an extra gear.
WHICH IS MORE COMFORTABLE TO SIT?
For stable seating, the position of the seat must be parallel to Earth’s surface (ground). The one in which you feel comfortable satisfies this requirement.
STANDING ERECT OR INCLINED?
For stable standing, the platform should be parallel to Earth’s surface so that the projection of Center of Gravity of the person standing passes through it. The one in which you stand strong satisfies this requirement.
LIQUID FLOW–LEFT OR RIGHT?
Without any external aid, liquids always flow downwards. In this exhibit too water does the same but appears as though it flows uphill only because the room is inclined and the tube too is inclined slightly lesser than the room but in the opposite direction.