A thin convex lens has focal length f. An object is placed a distance (3/2)f from the lens. At what distnce from the lens is the image formed?

 Figure shows an object and its image formed by a thin lens. What is the height of the image?  

A light ray is traveling in a diamond (n = 2.419).  If the ray approaches the diamond-air interface, what is the minimum angle of incidence that will result in all of the light reflected back into the diamond?  The index of refraction for air is 1.000.

Light with a wavelength of 589 nm in a vacuum strikes the surface of an unknown liquid at an angle of 31.2° with respect to the normal to the surface.   If the light travels at a speed of 1.97 x 108 m/s through the liquid, what is the angle of refraction?

A plane mirror always produces an image that is:

The speed of light is 1.90 times larger in material A than it is in material B. Determine the ratio nA/nB of the refractive indices of these materials.

A convex lens has a focal length f. If an object is located at 2f, at what distance from the lens is the image formed?

A thin convex lens has focal length f. An object is placed a distance (5/2)f from the lens. At what distnce from the lens is the image formed?

A coil of wire with a resistance of 0.45

How many introns does this predicted mRNA have?