This is the info for global variables for the GA4 in GTM
This is the testing info for global variables in phtml
testing on product page only for the catalog_product_view xml
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Experimental components
Light source, prism, light screen
Experimental process
(1) Demonstrate the decomposition of white light into seven colors - Build the experimental setup as shown in Figure A, where 1 is the light source, 2 is the lens, 3 is the prism, and 4 is the movable light screen. Connect the power supply to the light source. After the bulb lights up, move the lens left and right until a clear image of the filament appears in the center of the light screen. Fix the lens in place and place a prism on the fixed base (make sure it coincides with the outline of the prism on the surface of the fixed base). During the experiment, move the prism stage to make the angle of incidence of the incident light on the incident surface about 57°. At this time, in the direction of about 54° on the polarizing axis, a spectral band composed of red, orange, yellow, green, blue, indigo and purple colors can be received with a light screen.
(2) Demonstrate how to synthesize white light from one of its colors - Follow the instructions in Figure B and add another prism to Figure A. Install the additional prism on the prism stage. When placing another prism, make sure to place it as shown in Figure B-3. Now you can see that after passing through the first prism, the seven colors of light are synthesized into a beam of white light after passing through the second prism, and the synthesized white light has shifted relative to the original beam of white light.
Experimental phenomena
When a beam of white light passes through a prism, a spectral band composed of different colors of light arranged in sequence will appear on the light screen. When seven colors pass through another prism, they are synthesized into white light.
Experimental conclusion
White light is not a single color but is composed of seven colors: red, orange, yellow, green, blue, indigo and purple.
Additional analysis
The reason for the dispersion phenomenon of light is actually due to different refractive indices of transparent media for different colors of light. Therefore, after being refracted by a prism, different colors of light in white light are separated by different refractive indices to form a spectral band on a light screen.
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(1) Demonstrate the decomposition of white light into seven colors - Build the experimental setup as shown in Figure A, where 1 is the light source, 2 is the lens, 3 is the prism, and 4 is the movable light screen. Connect the power supply to the light source. After the bulb lights up, move the lens left and right until a clear image of the filament appears in the center of the light screen. Fix the lens in place and place a prism on the fixed base (make sure it coincides with the outline of the prism on the surface of the fixed base). During the experiment, move the prism stage to make the angle of incidence of the incident light on the incident surface about 57°. At this time, in the direction of about 54° on the polarizing axis, a spectral band composed of red, orange, yellow, green, blue, indigo and purple colors can be received with a light screen.
(2) Demonstrate how to synthesize white light from one of its colors - Follow the instructions in Figure B and add another prism to Figure A. Install the additional prism on the prism stage. When placing another prism, make sure to place it as shown in Figure B-3. Now you can see that after passing through the first prism, the seven colors of light are synthesized into a beam of white light after passing through the second prism, and the synthesized white light has shifted relative to the original beam of white light.
Experimental phenomena
When a beam of white light passes through a prism, a spectral band composed of different colors of light arranged in sequence will appear on the light screen. When seven colors pass through another prism, they are synthesized into white light.
Experimental conclusion
White light is not a single color but is composed of seven colors: red, orange, yellow, green, blue, indigo and purple.
Additional analysis
The reason for the dispersion phenomenon of light is actually due to different refractive indices of transparent media for different colors of light. Therefore, after being refracted by a prism, different colors of light in white light are separated by different refractive indices to form a spectral band on a light screen.
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Physics Lab Kits - physics experiment to validate that white light is not monochromatic (dispersion of light experiment)
