Homework Help: Physics

Posted by Jessica on Thursday, August 5, 2010 at 10:45am.

I'm working on a final physics exam, and I've got everything but these two that I'm stuck on. Any help would be appreciated, and explanations too (:

--A------B---(----F----

A and B are both pointing up.

1. ^ In that diagram, the image of object A would be
A) real, reduced, and upright.
B) virtual, enlarged, and upright
C) virtual, reduced, and inverted.
D) virtual, reduced, and upright.

and

2. Monochromatic light shines on the surface of a diffraction grating with 5.3 x 103 lines/cm. The first-order maximum is observed at an angle of 17°. Find the wavelength.
A) 420 nm
B) 520 nm
C) 530 nm
D) 550 nm

Thanks again!

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