Optics Answers

how do u find the focal length of lens expirementally

The sodium lamp used in a physics laboratory gives out light uniformly. Suppose
that the lamp uses 40 W. Calculate the magnitude of electric field.

Describe polarisation of light by reflection. How does degree of polarisation vary
with angle of incidence of light?

Depict spatial evolution of Fresnel diffraction pattern.

what is the interferometer ?

The focal length of a convex lens is 10cm, find the position of image when the object is placed at a distance of 30cm from a convex lens.

A tank truck was filled with 45,725 L of gasoline in Peshawar where the temperature was 28.0°C. The gasoline was delivered to Swat where the temperature was -12°C. Volume expansion coefficient of Gasoline is 950×10-6 °C-1.
Find out the amount of gasoline delivered in litres
Infer the volume of the gasoline due to changed temperature

Q1.What happen to the ray of light traveling along the principal axis?
Or

Q2.How is the power of a lens related to its focal length?

Morty is depressed. One night while sitting on the pier, aimlessly shining his laser into the water, he sees a glint from a shiny object. Specifically, he sees this light when he shines the laser 2.4 m in front of him while holding the pointer 1.8 m above the water. If the water is 5.5 m deep, what is the horizontal distance to the shiny object on the ocean floor? (Note: the index of refraction for water is 1.33)

in a biprism expt., the distance of 20th bright band from centre of interference pattern is 8mm.calculate distance of 30th bright band from centre.