The limiting angle of resolution for the eye is 1.4 × 10 -4 rad. What is the minimum separation between two point sources of light that the eye can distinguish if they are at a distance of 40 m from the observer?

A light ray, traveling parallel to the axis of a thin concave lens, strikes the lens near its midpoint. After traveling though the lens, this ray emerges traveling obliquely to the axis of the lens

An astronomical telescope has an objective of diameter 20 cm with a focal length of 150 cm. The telescope is used with an eyepiece of focal length 3.0 cm. What is the magnifying power of the telescope?

Draw a neat labelled diagram of how the image of a coin placed at the bottom of a container with water in it, appears to an observer.

An object is placed on an optical bench. A lens with a focal length of 15 cm is placed 30 cm from the object. A diverging lens with a focal length of -10 cm is placed 7.0 cm beyond that. Where is the final image formed, relative to the second lens?

A 4.0-cm-tall object is placed 50.0 cm from a diverging lens of focal length 25.0 cm. What is the nature and location of the image?

The image formed by convex lenses are

An electromagnetic wave travels through a medium with a relative permittivity ϵr​=9 and a relative permeability μr​=1. What is the speed of the electromagnetic wave in this medium?

A mirror with a focal length -25 cm has a 4.0 cm tall object placed 100 cm in front of it. What is the position of the image?

As shown in the figure, a laser positioned on a ship is used to communicate with a small research submarine resting on the  bottom of a lake. The laser is positioned 12 m above the surface of the water, and it strikes the water 20 m from the side of the ship. The water is 58 m deep and has an index of refraction of 1.33. How far horizontally is the submarine from the side of the ship? (Assume all numbers are accurate to three significant figures.)