Incidence — phryzby

Q. What is there to measure when a ray hits a surface at i?

What the draft establishes

Fills in once a draft is checked.

The web of concepts

given read from the words equation asked

The equations it used

None yet.

Check an answer

Q. What is there to measure when a ray hits a surface at $i$ ?

The playground

Inputs

angle of incidence

i

30.00°

The solution

Solved with Incidence

Given

$i$ yours to vary

Conclusion

The angle it makes with the normal, and nothing else. It is declared and never derived: no equation gives it, so asking for it is asking the book a question it cannot answer.

The Ruby

1require_relative "../physics"23question :incidence do4  describes "What is there to measure when a ray hits a surface at %{angle}?"5  given :angle6end

1require_relative "../questions/incidence"2require_relative "../science/ray_optics_and_optical_instruments/incidence"34solve :incidence, using: Incidence do5  take angle: :i6  conclusion "The angle it makes with the normal, and nothing else. It is declared and never derived: no equation gives it, so asking for it is asking the book a question it cannot answer."7end

1require_relative "../solutions/incidence"2require_relative "../pictures/light"34play_with :incidence do5  title "Incidence"67  input :i, default: 30.deg89  draw Light::Picture do10    surface11    ray "incident", arriving_at: :i, angle: true12  end13end

The laws

quantity	written	units	within	from
angle to the normal	$θ$	—	0 … 1.571	Incidence
angle of incidence	$i$	—	0 … 1.571	Incidence

i \equiv θ_{i} (before)

angle of incidence