In the straight-ahead direction (? = 0°) in Fraunhofer diffraction, which of the following is observed on the screen?

a. a minimum equal in width to the adjacent minima
b. a minimum double in width to the adjacent minima
c. a maximum equal in width to the adjacent maxima
d. a maximum double in width to the adjacent maxima


d

Physics & Space Science

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Radioactivity Basics: When an unstable nucleus decays by emitting an alpha particle, the atomic number Z of the nucleus

A. increases by 4. B. increases by 2. C. decreases by 2. D. decreases by 4. E. remains unchanged.

Physics & Space Science

An ideal gas is allowed to expand adiabatically. Assume the process is reversible. What is the change in entropy?

a. 0 b. nR ln (V2/V1) c. nR ln (T2/T1) d. kn ln (V2/V1) e. kn ln (T2/T1)

Physics & Space Science

Polarizing sunglasses have the transmission axis oriented ______________

Fill in the blank(s) with correct word

Physics & Space Science

Why is there a radioactive source in a smoke detector?

a. It makes the smoke particles radioactive. b. It ionizes the air. c. It powers the alarm when the battery wears out. d. none of the above

Physics & Space Science