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A prism
a spectroscope
The colour of starlight reveals the temperature of a star by wavelengths in the electromagnetic spectrum, to give a measuring tool for star temperature.
The prism does this.
spectrum analyzer
A special tool is required to separate the lines after the retaining clip is removed. They are relatively inexpensive and Auto Zone sells a set of these AC line separators for around $10.
Color Replacement Tool you can use to replace existing colors on image with Foreground color by painting with brush.
basically all selection tools except quick selection tool work with color range, best tool for color range selections is Select -> Color Range.
There is a special inexpensive tool that you can purchase from any auto parts store for removing these lines. Without this tool you can damage the lines.
The lasso tool is in many other programs like photoshop, however, i am assuming you mean adobe flash creator. The lasso tool is a tool that can be used to separate obvious lines for selection, whether it be to copy the selection or delete it. It is designed to make selecting what you want much easier rather than taking a lot of time getting rid of what you want manually.
ruler
so, a frog has 2 layers of skin and what do you use to separate the skin from the muscle?