The table below shows two types of electromagnetic waves and three random applications of electromagnetic waves. type of wave applications of waves gamma rays 1. used in spectrometers to measure elements on the surface of celestial bodies radio waves 2. used to measure gravity fields 3. detect the heat released by astronomical objects which of these best matches the waves with their applications? gamma rays—2 and radio waves—3 gamma rays—3 and radio waves—2 gamma rays—2 and radio waves—1 gamma rays—1 and radio waves—2

Correct Answer is 1 i.e. Gamma rays—2 and radio waves—3

Reason: 
1) In a hypernova, star as similar to nuclear fusion converts lighter elements into heavy elements. If fusion is not capable of generating enough pressure to counteract gravity, star immediately collapses to form a black hole. During this process, energy will be released, along the axis of rotation to form gamma-ray burst. Such gamma-ray burst was first detected using Fermi Gamma-ray Space Telescope. Thus, gamma-ray is capable of providing information of gravity fields.

2) Radiowaves are capable of inducing transitions that requires less energies. These transition includes nuclear excitation and electron excitation (in rotational energy level). Depending upon the value to Jmax, it is possible to determine the temperature and heat released by astronomical objects

No table found. the question asks for covalent bond based on electronegativies