Question

The alpha channel in rgba specifies ________.

Answer 1

Is specifies the opacity of a colour.


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Answer 2

The alpha channel in rgba specifies ________.

The alpha channel in rgba specifies the opacity for a color

RGBA color values are an extension of RGB color values with an alpha channal  which specifies the opacity for a color .with RGBA ( R=RED,G=Green,B=Blue ,A=Alpha).

the alpha channel is a color component  that represents the degree between 0.0 ( fully transparency ) and 1.0 ( fully opaque).it is used to determine how a pixel is rendered when blended  with another.typically alpha channel  can not define on a pixel by pixel basis but rather per object