Find the de Broglie wavelength λλlambda for an electron moving at a speed of 1.00×106m/s1.00×106m/s. (Note that this speed is low enough that the classical momentum formula p=mvp=mv is still valid.) Recall that the mass of an electron is me=9.11×10−31kgme=9.11×10−31kg, and Planck's constant is h=6.626×10−34J⋅sh=6.626×10−34J⋅s.

What is the role of the ocular lens?

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.

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)