Context is Superman (1939) #300, page 7
Transcript:
Scientist #1: Great Scott! The hatch is opening–
Scientist #1: --and a baby is coming out!
Scientist #2: Look! He’s as invulnerable to the laser as is his rocket!
Kal-El: I am hungry!
Context is Superman (1939) #300, page 7
Transcript:
Scientist #1: Great Scott! The hatch is opening–
Scientist #1: --and a baby is coming out!
Scientist #2: Look! He’s as invulnerable to the laser as is his rocket!
Kal-El: I am hungry!
The part where the hatch opens needs a frame where one of the guards freaks out and fires a laser before others stop him. Then it would be clear how the fuck did they discover the laser-resistance.
It’s even simpler than that… they were firing the laser at the hatch when it opened, and the laser beam hit the “baby” before they’d had a chance to turn it off.