An object of 6 cm height is 16 cm in front of a converging lens with focal length of magnitude 4 cm. what is the dimension of the image(include the unit and if it is the case the sign)?

cm

Explanation:

= height of the object = 6 cm

= distance of the object from the lens = 16 cm

= focal length of the lens = 4 cm

= image distance

using the lens equation

cm

= height of the image

Using the equation

cm

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.

be subject to a force andchange its motion