Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA
Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle, during a review session before a midterm:
Which type of electromagnetic radiation wave travels with the slowest speed?
(A) Gamma rays.
(B) X rays.
(C) Microwaves.
(D) TV.
(E) (All travel at same speed.)
(F) (I'm lost, and don't know how to answer this.)
Section 70160
(A) : 3 students
(B) : 5 students
(C) : 7 students
(D) : 8 students
(E) : 7 students
This question was asked again after displaying the tallied results with the lack of consensus, with the following results.
Section 70160
(A) : 3 students
(B) : 1 student
(C) : 0 students
(D) : 23 students
(E) : 3 students
Correct answer: (E)
All forms of electromagnetic radiation travel with the same speed!
Pre- to post- peer-interaction gains:
pre-interaction correct = 23%
post-interaction correct = 10%
Hake (normalized) gain = -17%
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