Here is the classification of the given objects or materials:

- Opaque (light cannot pass through):

- A piece of rock

- A sheet of aluminium

- A mirror

- A wooden board

- A CD

- An umbrella

- A wall

- A sheet of carbon paper

- A sheet of cardboard

- A kerosene stove

- Transparent (light can pass through clearly):

- Air

- Water

- A sheet of plane glass

- Translucent (light can pass through but not clearly):

- Smoke

- Fog

- A sheet of polythene

- A sheet of cellophane

- A wire mesh

- Luminous (objects that give off their own light):

- A piece of red hot iron

- A lighted fluorescent tube

- The flame of a gas burner

- A lighted torch

- Sun

- Firefly

- Non-luminous (objects that do not give off their own light):

- Moon

Please note that some objects can fall into more than one category depending on the specific conditions. For example, a piece of red hot iron is usually opaque, but it becomes luminous when heated to a high temperature. Similarly, a kerosene stove is typically opaque and non-luminous, but when it's lit, it becomes a source of light. So, it's important to consider the context when classifying objects.

[tex]Answer -[/tex]

1. Opaque: a piece of rock, a mirror, a wooden board, a sheet of aluminium, a sheet of plane glass, a sheet of carbon paper, a sheet of cardboard, a wire mesh, a wall
2. Transparent: air, water, a sheet of polythene, a CD, a sheet of cellophane, a lighted torch
3. Translucent: fog
4. Luminous: a lighted fluorescent tube, the flame of a gas burner, sun, firefly
5. Non-Luminous: piece of red hot iron, an umbrella, a kerosene stove, moon

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