Optics Answers

A step index fiber is made with a core of refractive index 1.36, a diameter of 49pm and a fractional refractive index change of 0.025. it is operated at a wavelength of 1.3

Find the refractive index of cladding

The diameter of 20th dark ring in a Newton's Ring system viewed normally is 0.6 c.m. Calculate the thickness of corresponding air film if wavelength of light used is 6X10 cm.

You will place a mirror slightly behind each headlight to reflect as much light as possible onto the road ahead. 

You need to use your cell phone, which broadcasts a signal at 900MHz

900MHz, but you are in an alley between two large buildings that have only a 5.0m

5.0m spacing between them. What is the angular width, in degrees, of the signal after it emerges from between the buildings?

A hockey bag (m = 18 kg) is dragged across the arena floor by a hockey player who applies a horizontal force of 99 N against a kinetic friction force of 87 N.

a) Calculate the work done on the hockey bag over a displacement of 9 m.

(i) By the hockey player.

(ii) By the force of kinetic friction.

b) Calculate the net (total) work done on the hockey bag.

c) Calculate the change in the kinetic energy (ΔEK) of the hockey bag. 

calculate the refractive index of a material when A is 60⁰ and d is +2

Explain interference

A concave mirror has a focus of 75cm. An object is placed 60cm in front of the mirror. Describe the image characteristics of this object

What is frenel diffraction.

The inability of a lens to form a white image of a white object is known as ________