Correct Answer - Option 2 : X - rays
X-rays:
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X-rays ionize gases through which they pass. Hence use to study atomic structure.
- Soft X-rays have a greater wavelength and lower frequency and hard X-rays have a lower wavelength and higher frequency.
- X-rays are not deflected by electric and magnetic fields.
- X-rays show all the important properties of light rays like reflection, refraction, interference, diffraction, and polarisation, etc.
- X-rays were discovered by scientist Roentgen.
1). Ultraviolet (UV) is a form of electromagnetic radiation with wavelengths from 10 (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays.
2). Infrared radiation (IR), is a type of radiant energy that is invisible to human eyes but that we can feel as heat. All objects in the universe emit some level of IR radiation, but two of the most obvious sources are the sun and fire.
The heat that we feel from sunlight, a fire, a radiator or a warm sidewalk is infrared.
