A concave mirror has a radius of curvature. How far from the mirror must an object be placed to create an upright image three times the height of the object?
An object is placed at away from the concave mirror.
We have given,
Radius of curvature=
Height of the image=
We have to find the distance of the object from the mirror.
We know Magnification of mirror
Using mirror equation
Shown from above in FIGURE P34.54 is one corner of a rectangular box filled with water. A laser beam starts from side A of the container and enters the water at position x. You can ignore the thin walls of the container.
a. If , does the laser beam refract back into the air through side B or reflect from side B back into the water? Determine the angle of refraction or reflection.
b. Repeat part a for .
c. Find the minimum value of x for which the laser beam passes through side B and emerges into the air.
A -tall object is in front of a converging lens that has a focal length.
Use ray tracing to find the position and height of the image. To do this accurately, use a ruler or paper with a grid. Determine the image distance and image height by making measurements on your diagram. Calculate the image position and height. Compare with your ray-tracing answers in part .
A fortune teller’s “crystal ball” (actually just glass) is 10 cm in diameter. Her secret ring is placed 6.0 cm from the edge of the ball.
a. An image of the ring appears on the opposite side of the crystal ball. How far is the image from the center of the ball?
b. Draw a ray diagram showing the formation of the image.
c. The crystal ball is removed and a thin lens is placed where the center of the ball had been. If the image is still in the same position, what is the focal length of the lens?
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