Pls do the 2nd question
Dear Student
The test tube has air inside it. In the outer surface of the tube is water. Due to the different media across tube surface the reflection of light occurs through the glass surface. Hence test tube shines (behaves) like a mirror.
Regards
The test tube has air inside it. In the outer surface of the tube is water. Due to the different media across tube surface the reflection of light occurs through the glass surface. Hence test tube shines (behaves) like a mirror.
Regards