What happens when an enlarging light and a shrinking light simultaneously illuminate an object?

Haha, this is a classic brain teaser that's been circulating among Doraemon fans forever! Think about it: one gadget makes things infinitely bigger, the other makes things infinitely smaller. Putting these two together is basically the sci-fi version of "using your spear against your shield" – full of paradoxical fun.

While Fujiko F. Fujio never depicted this scenario in the original manga or anime, that doesn't stop us from speculating based on the usual "quirks" of Doraemon's gadgets. Essentially, there are a few possibilities:

Possibility One: Mutual Cancellation, Nothing Happens

This is the most logical, and also the most "boring," guess.

You can imagine the Grow Light and Shrink Light engaged in a "tug-of-war." The Grow Light pulls towards "big," the Shrink Light pulls towards "small." If the power, distance, and angle of both lights are exactly the same, the "size-changing forces" they exert on the object would be equal in magnitude but opposite in direction.

Result: The object is stuck between the two forces, unable to move, and ultimately undergoes no change. It's like pressing both the volume up and volume down buttons on your remote at the same time – the TV volume probably won't change.

Possibility Two: Last One Wins, or Might Makes Right

This possibility is more interesting and fits better with some "programming logic."

Time Priority: Whichever light shines on the object last takes effect. For example, if you shrink a dorayaki with the Shrink Light first, and then Nobita is about to eat it when you immediately shine the Grow Light on it, the dorayaki would instantly cancel the "shrink" state and start growing instead. This is like computer commands; the last input command overwrites the previous one.
Strength/Distance Priority: Whichever light is "stronger" or closer to the object wins. Maybe the Grow Light has slightly higher energy output than the Shrink Light, so under simultaneous exposure, the object would slowly grow. Conversely, if the Shrink Light is closer and its beam is more intense, the object would shrink.

Possibility Three: Physics Breaks Down, Causing Bizarre Phenomena (My personal favorite!)

This is the outcome that best fits the Doraemon worldview! When Doraemon's gadgets are misused or encounter paradoxes, they rarely just "fail" simply. Instead, they tend to cause all sorts of weird and major trouble.

Imagine an object simultaneously receiving the contradictory commands "Grow!" and "Shrink!" Its internal spatial structure could descend into utter chaos.

Crazy Flickering: The object might flicker and shudder wildly between "big" and "small," looking incredibly glitchy visually.
Spatial Distortion: The object's form wouldn't just simply grow or shrink. It might become twisted, stretched, like something seen in a funhouse mirror, or even collapse from a 3D object into an unstable 2D plane.
Structural Collapse: Worst-case scenario, these conflicting commands directly disrupt the object's fundamental particle structure, preventing it from maintaining its form. It would ultimately go "poof!" – decomposing, breaking like an overloaded appliance, or even vanishing into a wisp of smoke.

This perfectly aligns with the consistent Doraemon trope of "misuse or incorrect use of gadgets leads to big trouble."

To Summarize

So, if the Grow Light and Shrink Light shine on an object simultaneously:

The Most Scientific Possibility: Effects cancel out, nothing happens.
The Most Program-Like Possibility: The light that shines last or is stronger takes effect.
The Most Doraemon-Like Possibility: The object flickers, distorts, or even outright disintegrates!

Personally, I favor the third possibility the most. After all, isn't watching Nobita misuse a gadget and then frantically try to clean up the mess a huge part of Doraemon's charm? If nothing happened, it would just be too boring!