it is opaque
Yes, books are usually opaque. Opaque means to block the passage of radiant energy and especially light.
Opaque Materials, such as wood or steel, do not transmit light, accept in the case of a few Physicists, today, claiming that they have, in fact, transmitted light rays through different "holes" in different kinds of opaque materials.
Need not be opaque to other wavelength ranges. A thin metal sheet is opaque to visible light, but not to x-rays.
A material that will not allow the transmission of light is called an opaque material.
choroid
the pupil
choroid
choroid
choroid
(Opaque - not allowing light to pass through, non-transparent.)"The barn windows were covered by a nearly opaque layer of dirt.""To observe the Sun's corona, astronomers use an opaque circle of material to block the solar disk."
Some gasses are opaque to certain wavelengths of the electromagnetic spectrum. Ozone O3 is opaque to UV rays and blocks them. Other gasses are opaque to other wavelengths.
false. the choroid is the opaque middle layer of the eye that contains blood vessels and provides the blood supply for the entire eye.
Considering that transparency and opacity are opposites, yes. Something completely transparent is not at all opaque, and something completely opaque is not at all transparent. However, something which is 50% transparent is also 50% opaque, and something 25% transparent would be 75% opaque, and something 25% opaque would be 75% transparent. Transparency and opacity are at the opposite ends of the same scale.
Ozone is (relatively) opaque to ultraviolet light.
No, the sclera is actually an opaque, white, fibrous layer that protects the eye. It is not a space, it contains collagen and elastic fibers.
Aluminum foil is opaque.