Let c={φ,{φ},{{φ}}} what is the power set of the set c.

What happens to the light rays when they hit the specimen?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Blank liquids and gases exert a buoyant force on objects placed in them