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Energy Changes Bars
Tool: The Energy Changes Bars
Tool plots colored bars that display the radiant energy
incident on a material, the energy reflected by the
material, and the energy absorbed (which becomes internal
thermal energy).
Place
an energy bars tool by first selecting Material
A or Material
B, then clicking on the Energy
Bars button, and finally clicking at the desired position of
the bar graph. You can reposition the energy bars
graph.
In the energy bars tool's
Properties
Box, you can set:
- Refresh time. How often
the tool redraws the energy bars. The default value is
0.2 sec. This feature is more important in
simulators with a
Run
mode.
- Show energy readouts.
Controls whether energies are displayed as numbers as
well as bars. Default option is to display the
readouts.
- View mode. Determines
the size of the Energy Changes Bars display. You have
three choices,
min mode,
normal mode, and
max
mode. The figure at the bottom
of this help page illustrates the differences between the
three modes.
- Scale mode. You have
two choices,
auto
mode or
hand
mode. For descriptions of
these two modes and what you need to consider in making
the choice, see Choosing
Scale Mode on the
graph
tool's help page.
- Maximum value.
Hand
mode only: Sets the maximum
energy value displayed by the bars. In
auto
mode, setting this value has
no effect.
To displays bars for non-visible
light, check the box labeled show non-visible
light in the background
properties.
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The figure below illustrates the
layout and the three different View modes
of the Energy Changes Bars tool for blue
material
(min
mode and
normal
mode) and magenta
material
(max
mode).
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For each body, the Rate of
Energy Input to the material by the light
from the source is displayed in the top row. The
second row displays the Rate of Energy Output
to the surrounding environment by the
amterial due to reflection. The third row displays
the Rate of Energy Changes in System
(i.e., in the material) as a result of light
absorption and subsequent heating.
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