Which are uses of lasers? check all that apply. 1.scanning a bar code on a price tag for a shirt 2.creating a magnified image of the moon 3.cutting an iron bar into two pieces 4.reshaping a cornea to improve vision 5.making a leaf appear larger so its veins are visible

1. scanning a bar code on a price tag for a shirt

3. cutting an iron bar into two pieces

4 .reshaping a cornea to improve vision

The correct answers are: (1), (3) and (4).

Explanation:

Laser: The full form of laser is "Light amplification by stimulated emission of radiation". It is a device which is used to generate an coherent monochromatic light. It is stimulated emission of the photons.

The uses of Laser are : in surgery, drilling and cutting and in reading bar codes. Laser beam is used in an eye surgery. It is used in cutting the metal.

Therefore, the following are the uses of lasers from the given options as;

Scanning a bar code on a price tag for a shirt  

Cutting an iron bar into two pieces

Reshaping a cornea to improve vision