Two Sources of Light Illuminate a Double Slit Simultaneously

question 19

Multiple Choice

Two sources of light illuminate a double slit simultaneously. One has wavelength 570 nm and the second has an unknown wavelength. The m = 5 bright fringe of the unknown wavelength overlaps the
M = 4 bright fringe of the light of 570 nm wavelength. What is the unknown wavelength?

• A) 456 nm
• B) 326 nm
• C) 380 nm
• D) 713 nm

---

Definitions:

Extensor Digitorum

A muscle in the forearm that extends the fingers and the wrist.

Pectoralis Major

A large muscle in the upper chest that aids in the movement of the shoulder and the arm.

Deltoid

A large, triangular muscle covering the shoulder joint that is responsible for lifting the arm and giving the shoulder its range of motion.

Triceps Brachii

A muscle of the upper arm, responsible for extension of the elbow joint.