Class: PhysicsPlus::Optics

Inherits:
Object
  • Object
show all
Defined in:
lib/physics_plus/optics.rb

Overview

This class optics formulas

Class Method Summary collapse

Class Method Details

.absolute_refractive_index(speed) ⇒ Object 



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# File 'lib/physics_plus/optics.rb', line 5

def self.absolute_refractive_index(speed)
  raise 'speed must not exceed the speed of light' if Constants::C < speed
  raise 'speed must be positive' if speed.negative?

  (Constants::C / speed.to_f)
end

.interference_maximum_condition(k, lambda) ⇒ Object 



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# File 'lib/physics_plus/optics.rb', line 44

def self.interference_maximum_condition(k, lambda)
  k * lambda.to_f
end

.interference_minimum_condition(k, lambda) ⇒ Object 



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# File 'lib/physics_plus/optics.rb', line 40

def self.interference_minimum_condition(k, lambda)
  (2*k+1)*lambda.to_f/2
end

.linear_magnification_lens(image_size, item_size) ⇒ Object 



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# File 'lib/physics_plus/optics.rb', line 30

def self.linear_magnification_lens(image_size, item_size)
  raise 'image size must be positive' if image_size.negative?
  raise 'item size must be positive' if item_size.negative?

  raise 'image_size not be zero' if image_size.zero?
  raise 'item_size not be zero' if item_size.zero?

  image_size.to_f/item_size
end

.power_lens(focal_length) ⇒ Object 



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# File 'lib/physics_plus/optics.rb', line 12

def self.power_lens(focal_length)
  raise 'optical distance must be positive' if focal_length.negative?
  raise 'optical distance must not be zero' if focal_length.zero?
  
  1/focal_length.to_f
end

.thin_lens_formula(f, d) ⇒ Object 



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# File 'lib/physics_plus/optics.rb', line 20

def self.thin_lens_formula(f, d)
  raise 'distance from object to lens must be positive' if d.negative?
  raise 'distance from image to lens must be positive' if f.negative?

  raise 'distance from object to lens must not be zero' if d.zero?
  raise 'distance from image to lens must not be zero' if f.zero?
  
  (f + d)/(f.to_f * d)
end