Which of the following experimental results prove the wave nature of light (i. e., which results can only be explained through wave behavior)? rainbow patterns that form when white light passes through a prism. interference pattern that forms when light passes through two small slits in a barrier equal angle reflection of a laser beam forms off a mirrored surface all of the above statements are true

All of the above statements are true

Explanation:

Wave nature of light is supported by the phenomena such as interference, polarization of light and diffraction.

Experiments like Young's double slit experiment, Huygens' principle, quantum theory also proved the wave nature of light that light is composed of electromagnetic waves.

Therefore, formation of rainbow patter, interference pattern and reflection at equal angle of a beam of laser, all of these results supports the wave nature of light.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.