A body that produces its own light is said to be

Step 1: Analyze the question The question asks for the term used for a body that gives out (produces) its own light.

Step 2: Explain the concept Objects are classified by how they relate to light:

• Luminous bodies produce their own light, for example the Sun, stars, a lit candle, and an electric bulb that is switched on.
• Non-luminous bodies do not produce light. We see them only because they reflect light from luminous sources, for example the Moon, a book, and a table.

Objects are also classified by how they transmit light:

• Transparent: allows light to pass through clearly, such as clear glass.
• Translucent: allows some light through but scatters it, such as frosted glass or oiled paper.
• Opaque: allows no light through, such as wood or metal.

Step 3: Check each option

• A. Luminous: correct, since it means self-light-producing.
• B. Non-incandescent: incandescence is light produced by heating something until it glows. "Non-incandescent" means not glowing from heat, which does not define a light-producing body.
• C. Opaque: describes blocking light, not producing it.
• D. Translucent: describes partial transmission of light.
• E. Transparent: describes full transmission of light.

Step 4: Answer A body that produces its own light is said to be luminous, which is option A.

Exam tip: Remember "Lumin = light". Luminous means it gives light, while the Moon is non-luminous because it only reflects sunlight. Questions about transparent, translucent, and opaque are always about light passing through, not light being produced.