3. State laws of reflection of light.
Or
Define absolute refractive index and express
it mathematically.
4. Draw magnetic field lines around a bar
magnet.
5. What happens when 5% alkaline potassium
permanganate solution is added drop by drop
to warm propyl alcohol (propanol) taken in a
test tube? Explain with the help of a chemical
equation.
Answers
Answer:
Here's ur answer
Explanation:
LAWS OF REFLECTION
1.The incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane.
2. The angle of reflection is equal to the angle of incidence . Both angles are measured with respect to the normal to the mirror.
ABSOLUTE REFRACTIVE INDEX
Absolute refractive index is the refractive index of a medium in vacuum. More specifically, it is the ratio of the speed of light in vacuum to the speed of light in that medium. It is always greater than one .
n=c/v
where, n=Absolute refractive index
c= Speed of light
v= Speed of medium
When 5% alkaline potassium permanganate solution is added drop by drop to propanol taken in the test tube, then its purple colour disappears as it oxidizes the propanol to its respective carboxylic acid i.e. propanoic acid.
It is because alkaline potassium permanganate is known to be a strong oxidizing agent, which oxidizes the primary alcohol -- propanol to propanal and then finally to propanoic acid.
CHEMICAL EQUATION
It is attached to image
