A microwave oven uses wave with a

The correct answer is Option 1.

Microwaves are a form of electromagnetic radiation with frequencies ranging between 300 MHz and 300 GHz. In the electromagnetic spectrum, they are positioned between infrared radiation and radio waves. This placement means they possess longer wavelengths compared to visible light, ultraviolet rays, and X-rays.

• Invisible Range: The human eye can only detect waves in the visible spectrum (approximately 380 to 700 nm). Since microwaves have much longer wavelengths (1 mm to 1 meter), they fall strictly within the invisible range.
• Large Wavelength: Compared to the "small" wavelengths of the visible spectrum, microwaves are characterized as "large."

Options 2 and 3 are incorrect because microwaves are not part of the visible spectrum. Option 4 is incorrect because, while they are invisible, their wavelengths are significantly larger than those of visible light or gamma rays, making "large" the appropriate descriptor in this comparative context.