Setup, Limited warranty, Equipment return – PASCO ME-8957 ROTATIONAL ACCELERATION TANK User Manual

Page 3

012-05771B

Rotational Acceleration Tank

The Rotational Acceleration Tank can be used to
demonstrate why the sky is blue and the sunset is red.
When sunlight enters the upper atmosphere the shorter
wave lengths of the visible spectrum are scattered in
all directions by the molecules of the upper atmo-
sphere. The remaining light passes through. When we
observe a portion of the sky, ( not directly between us
and the sun) we only see the scattered (blue) light.
When the sun sits low on the horizon, Its light must
travel through a larger amount of atmosphere. The
majority of the shorter wavelength (blue) has been
scattered leaving only the longer wavelength light (red).

Setup

➀

Place the tank on the rotating platform, or on a
stable desktop and fill the tank with the liquid to be
observed.

➁

Add a small amount of contaminant to the fluid,
such as clear dish soap, in the tank to enhance the
effect.

➂

While observing the front of the tank shine a light

source down the long axis of the tank. See Figure 5.

The scattered light from the tank will have a bluish tint
just like the scattered light from the atmosphere.

➃

Look down the long axis of the tank, toward the
light source, and observe the light shining through

the tank. See Figure 6.

The light shining through the tank has a reddish or
orange tint just like the sun at sunset.

Limited Warranty

PASCO scientific warrants this product to be free from
defects in materials and workmanship for a period of one
year from the date of shipment to the customer. PASCO
will repair or replace, at its option, any part of the product
which is deemed to be defective in material or workman-
ship. This warranty does not cover damage to the product
caused by abuse or improper use. Determination of
whether a product failure is the result of a manufacturing
defect or improper use by the customer shall be made
solely by PASCO scientific. Responsibility for the return
of equipment for warranty repair belongs to the customer.
Equipment must be properly packed to prevent damage
and shipped postage or freight prepaid. (Damage caused
by improper packing of the equipment for return ship-
ment will not be covered by the warranty.) Shipping
costs for returning the equipment, after repair, will be
paid by PASCO scientific.

Equipment Return

Should this product have to be returned to PASCO
scientific, for whatever reason, notify PASCO scientific
by letter or phone BEFORE returning the product. Upon
notification, the return authorization and shipping instruc-
tions will be promptly issued.

➤ NOTE: NO EQUIPMENT WILL BE AC-
CEPTED FOR RETURN WITHOUT AN AU-
THORIZATION.

When returning equipment for repair, the units must be
packed properly. Carriers will not accept responsibility
for damage caused by improper packing. To be certain
the unit will not be damaged in shipment, observe the
following rules:

➀

The carton must be strong enough for the item
shipped.

➁

Make certain there is at least two inches of packing
material between any point on the apparatus and the
inside walls of the carton.

➂

Make certain that the packing material can not shift in
the box, or become compressed, thus letting the instru-
ment come in contact with the edge of the box.

light source

scattered light

Rotational

Acceleration Tank

(filled with fluid)

rotating

platform

viewpoint of

observer

Figure 5: Blue Sky