Lenses

Physics D did not meet due to an assembly, so will only conduct one investigation of their lab unit before Thursday's test. Physics F and Honors Physics started their labs today, beginning with lenses and image formation and moving on to aperture and depth of field. Depending on the time allotted groups made it to different stopping points and will continue with their work tomorrow. Most groups, at minimum, worked through real image formation by double-convex lenses and saw clearly the pattern demonstrated in the table in their textbooks that we referenced during lecture, but by tomorrow at the end of the period, all groups should be finished with both experiments and ready for Wednesday's review in preparation for Thursday's exam.

Intro Physics took on the topic of standing waves today, and used their lab on this topic to highlight their work. We discussed the physical structure of standing waves,the interaction of reflection and interference that forms them and relationship between frequency and wavelength for standing waves and saw how it met the pattern for other wave types, as wavelength decreased through the standing wave series, the frequency increased to keep the speed of the waves constant in the medium. We looked at how to calculate wavelength for standing waves and use wavelength, along with the wave speed formula to assess the frequency of the standing waves. We then noted that the relationship between the frequency of standing waves in a series and saw they were integral multiples of each other. In the next chapter, we'll examine standing waves in more detail when we discuss music and harmonic series. Tomorrow, we review tonight's homework, the chapter concepts and answer questions in preparation for Wednesday's exam.