Yellow Light Is Viewed by Reflection from a Thin Vertical $\lambda$

question 40

Multiple Choice

Yellow light is viewed by reflection from a thin vertical soap film. Let $\lambda$ be the wavelength of the light within the film. Why is there a large dark space at the top of the film?

• A) no light is transmitted through this part of the film
• B) the film thickness there is \(\lambda\)/4
• C) the light reflected from exactly one of the two surfaces undergoes a 180\(\degree\) phase change
• D) the film is too thick in this region for thin film formulas to apply
• E) the reflected light is in the infrared

Comprehend the mechanisms of autocratic control within organizations.

Understand the process of identifying performance issues and setting performance standards.

Recognize the various approaches (historical, relative, engineering) for comparing desired and actual performance.

Differentiate between input, output, and performance standards, and their importance in business operations.

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Definitions:

Truck System

A comprehensive arrangement of components and mechanisms which constitute the functionality of a truck, including its engine, transmission, drivetrain, and electronics.

Truck Data Bus System

A digital communication network in trucks that carries data between various electronic control units (ECUs).

SAE J1939

Covers both the hardware and software protocols used on the current CAN 2.0 platform for medium-/heavy-truck data bus. A J1939 truck data bus is accessed by connecting to an EST to a nine-pin Deutsch black (pre-2014) or green (post-2014) connector. Post-2014 Volvo-Mack applications require a J1962 connector.

Byte

An arrangement of 8 bits. Each bit can express one of two states such as 0 or 1, high or low voltage, etc. One byte can, therefore, be used to express up to 256 different states.