Gold and copper happen to absorb ______ and violet light, leaving yellow light.

blue

The correct answer is option 2. blue.

Gold and copper happen to absorb Blue.

Gold and copper absorb blue light, which is at the higher energy end of the visible spectrum, while reflecting or transmitting lower-energy light, such as yellow. This selective absorption results in the perception of the characteristic color of these metals. For instance, when gold absorbs blue light, it appears yellow to our eyes. Similarly, copper absorbs blue light, giving it a reddish-brown color. Therefore, blue light is absorbed by gold and copper, leaving behind yellow light, which we perceive as the color of these metals.