The Southeast Asia state know as French Indochina is today known as …

Roosevelt established the ____________, similar to the agency Wilson had created during WWI, to ease tensions between business and labor and end labor strife.

The schematic illustrates the far point and near point of the eye. Given that q = 5 m, p = [p] cm, and d = 1.7 cm, determine the refractive power (in diopters) of a corrective lens required so that objects at a distance of 25 cm can be seen clearly.

The schematic illustrates the far point and near point of the eye. Given that q = 80 cm, p = [p] cm, and d = 1.7 cm, determine the power of accommodation of the eye (in diopters).

A converging lens has a focal length of 5 cm. An object forms a virtual image, which is located at 12 cm to the right of the lens. The image height is [hi] cm. What is the object height (unit in cm)? Express the answer as a positive quantity. [Hint: is the image upright or inverted?]  

You need to use a [f]-cm-focal-length lens to produce an inverted image twice the height of an object. At what distance from the object should the lens be placed (unit in cm)?

A lens with f = +[f1] cm is in contact with a lens with f = -20 cm. What is the focal length of the combination (unit in cm)?

You combine two thin lenses by placing them in contact so that their axes coincide, forming what is called a compound lens. The focal lengths of the lenses are 30 cm and −50 cm, respectively. If an object is [ho] cm tall and d1 = [d1] cm, what is the height of the image (unit in cm)? Express the answer as a positive quantity.

 A slide projector needs to create a 98-cm-high image of a 2.0-cm-tall slide. The screen is [d] cm from the slide. What focal length does the lens need (unit in cm)? Assume that it is a thin lens. [Hint: the image is real or virtual?]  

A very thin oil film (n = [n2]) floats on water (n = 1.33). What is the thinnest film that produces a strong reflection for a wavelength of [lamda] nm? Express your answer in nm.