An object in which no light rays can pass through is called: 

Light plays a crucial role in how we perceive objects. Depending on how an object interacts with light, it can be classified into different categories based on its transparency.

 Key Points

• The ability of light to pass through an object determines whether it is clear, partially clear, or completely obstructing.
• An object in which no light rays can pass through is called opaque.
• Opaque objects completely block the passage of light. When light strikes an opaque object, it either gets reflected, absorbed, or scattered, but it does not pass through the object.
• Common examples of opaque materials include wood, metal, and stone.

Hint

•  Translucent objects allow some light to pass through but scatter it, so you can see light but not clear details behind them, such as frosted glass.
• Transparent objects allow light to pass through clearly, and you can see through them clearly, like clear glass or water.
• Convex refers to the shape of a lens that is curved outward, which is unrelated to light passing through an object.

Hence, the correct answer is Opaque.