Here's a breakdown:

What makes an object luminous?

* Emits its own light: This is the primary definition. Luminous objects generate light through internal processes. Examples: Sun, light bulbs, fireflies.

Is a laser a luminous object?

* Technically, yes: A laser itself does produce light. It uses stimulated emission to create a coherent beam of light.

* But, it's not a "source" in the same way as a light bulb: A laser doesn't generate its own light in the same way as a light bulb. It amplifies light that is already present.

So, it's a bit of a gray area.

* From a physics perspective: You could argue that a laser isn't truly luminous because it doesn't generate light internally.

* From a practical perspective: You could say a laser is luminous because it produces a very bright, noticeable beam of light.

It all depends on the context and how strictly you define "luminous object."