Which One of the Following Expressions Determines the Critical Angle $\theta$

question 19

Multiple Choice

Which one of the following expressions determines the critical angle for quartz (n = 1.5) immersed in oil (n = 1.1) ?

• A)\(\theta\)_c = 1.5/1.1
• B)\(\theta\)_c = sin^-1 (1.1/1.5)
• C)\(\theta\)_c = sin (1.1/1.5)
• D)\(\theta\)_c = tan^-1 (1.1/1.5)

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Definitions:

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The weakening of a brand's power and value due to overuse, overextension, or ineffective marketing strategies, leading to a loss of brand exclusivity and consumer confusion.

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The strategy of using an existing brand name for new products in different categories to leverage brand equity.