Question

which ems wave has a wavelength equal to the size of a needle point and is used in heat lamps for reptiles as well as night vision technology? radio waves infrared visible microwaves

Explanation:

Infrared waves have wavelengths in the range that can be comparable to the size of a needle point. Infrared is used in heat lamps (as it is associated with heat, which is useful for reptiles to maintain their body temperature) and in night - vision technology (as it can detect heat signatures or emit infrared light that is then detected to see in low - light conditions). Radio waves have much longer wavelengths, visible light has wavelengths in a different range (not typically associated with the described applications in the question), and microwaves have wavelengths that are not in the range relevant to the size of a needle point for the given applications.

Answer:

Infrared