00:01
In this question, we are given that a certain mineral, so we are given a mineral which is white in color generally.
00:09
When some uv light is passed on to this white mineral, then this white mineral changes to the color of light red.
00:24
Hence, we need to find the reason for this phenomenon.
00:29
Hence, we see that the uv light when falls on the white mineral turns to be light red color.
00:37
The light red color comes under the visible region of wavelength, whereas the uv light belongs to the not visible region.
00:49
Uv visible we cannot see through the normal naked eyes, so it is a non -visible region of wavelength.
00:58
So here we see that the phenomenon happening here is that one type of wavelength of light is converted to another type of wavelength of light that is uv light.
01:15
Here it is converted to the light red color that is visible color due to the mineral that is one wavelength of light converted to some other different wavelength and this phenomenon is called the fluorescence phenomenon that is the wavelength of light changes in the process that is why this is called the fluorescence.
01:48
The fluorescence is the one of the property of the material.
01:56
Hence fluorescence is present in option d, hence option d is the right answer for this question.
02:02
In this section, in 9th part we are given three words and we are asked the relation between these three words.
02:11
We are seeing here that all the three words are types of rocks.
02:16
The first word is metamorphic...