A beam of light that is parallel to the principal axis strikes a convex mirror. What happens to the reflected beam of light? A) It also is parallel to the principal axis. B) It is no longer parallel to the principal axis and after reflection converges towards the near focal point C) It appears to be coming from the focal point on the other side of the mirror. D) It appears to be coming from the focal point on the same side as the object E) It appears to be coming from a point between the near focal point and the center of the mirror.

QUESTION 2 The Air Mass is.. A. the mass of air through which blockes solar irradiance. B. the mass of air through which the solar radiance passes. C. the mass of air through which the solar irradiance passes. O D. the mass of solar irradiance.

Two point sources of coherent light with a wavelength of 700 nm are near each other. The light from these sources is interfering in space around them. If you determine there is destructive interference between the two sources at a point 70.35 μm away from the second source, how far away from this point might the first source be? (Note that the image shown is not drawn to scale.) Source 1 74.20 μm o 77.175 um - 80.85 um ○ 80.85 μm 80.85 μm ? Source 2 70.35 μm destructive interference here

1. Using Snell’s Law, derive an equation for the critical angle θc.    2. Explain why total internal reflection cannot occur in cases where n1<n2.

The front and side views are given for the objects. Use this information to create the top view. Note for C the top view is given and side is missing.

To correct the vision of a hyperopic eye, a corrective lens should enable the wearer to focus on objects that are as close as the ideal near point. One way to think of this is that the corrective lens should take an object located at the ideal near point and create an image of it at the wearer's near point. (Remember that the wearer's eye is a short distance behind the corrective lens.) Draw a ray diagram showing this situation and find the necessary focal length of the lens in terms of the wearer's near point, the ideal near point, and the distance between the corrective lens and the eye.

The finish of a radiating surface affects the amount of energy absorbed and emitted by the surface. Select one: a. True O b. False

estion 31 10 points Determine the theta, 0, angle for the first order reflection (n = 1) from these {111} planes if the X-ray has a wavelength of 0.154 nm? Moving to another question will save this response. 7 8 W Question ( Question

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