When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4°. What is the wavelength of the light?
A) 336 nm B) 752 nm C) 633 nm D) 452 nm E) 363 nm
C
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A(n) _______________ is an atom that has gained or lost one or more electrons
Fill in the blank(s) with correct word
In many cartoon shows, a character runs of a cliff, realizes his predicament and lets out a scream. He continues to scream as he falls
If the physical situation is portrayed correctly, from the vantage point of an observer at the top of the cliff leaning over the edge, the pitch of the scream should be A) higher than the original pitch and constant. B) higher than the original pitch and increasing as he falls. C) lower than the original pitch and constant. D) lower than the original pitch and decreasing as he falls. E) It is impossible to predict.
Before light can undergo total internal reflection when incident on material 2 from material 1, what must be true of the indices of refraction?
a. n1 = n2 b. n1 < n2 c. n1 > n2 d. Either n1 or n2 must be equal to 1.
A 4.0-cm tall object is placed 60 cm away from a converging lens of focal length 30 cm. What are the nature and location of the image? The image is
A) real, 2.5 cm tall, and 30 cm from the lens on the same side as the object. B) virtual, 4.0 cm tall, and 60 cm from the lens on the same side as the object. C) virtual, 2.0 cm tall, and 15 cm from the lens on the side opposite the object. D) virtual, 2.5 cm tall, and 30 cm from the lens on the side opposite the object. E) real, 4.0 cm tall, and 60 cm from the lens on the side opposite the object.