### Aberration

"In optics, a deviation in the rays of light when unequally refracted by a lens or reflected…

### Brilliant Cut

A cut of a gemstone. A brilliant cut stone has fifty-eight facets.

### Cup and Shilling

"The refraction of water is beautifully proved by the following simple experiment. Place an empty cup,…

### Refraction of Light through Bi Convex Lens

"...let LN represent a glass biconvex lens, with centres of curvature at C and C', and AB, the incident…

### Convex Lens

"When the object is at a long distance from the lens, the image formed is smaller than the object, and…

### Refraction

"The following simple experiment illustrates the effect of refraction:—Place a silver coin, m,…

### Sound Refraction

"Fill with carbon dioxide a large rubber toy balloon or other double-convex lens having easily flexible…

### Refraction of Light through Glass

"Illustrating refraction of light from a source through glass, and the appropriate angles of refraction."…

### Refraction Between Mediums

"Since air is a rarer medium and water is denser, as ray A passes into the water, it is refracted to…

### Refraction of Light

"Although a ray of light will pass in a straight line, when not interrupted, yet when it passes obliquely…

### Refraction, air, water, glass

"Let a represent a, b water, and c a piece of glass. The ray d, striking each medium in a perpendicular…

### Object Refracted through Biconvex Lens

"Showing how an object is refracted through a biconvex lens." -Avery 1895

### Refraction by Plates

"When radiant energy passes through a medium bounded by parallel planes, the refractions at the two…

### Refraction of Complimentary Colors

"The prism will deflect the red and orange, and form a reddish colored image at n. The violet, indigo,…

### Explanation of Refraction

"Thus, when erher waves that constitute light are transmitted through glass, they are hindered by the…

### Refraction by the Eye

"Illustration depicting the refraction by the eye." -Comstock 1850

### Refraction, glass and water

"Let the medium b be glass, and the medium c, water. The ray a, as it falls upon the medium b, is refracted…

### Refraction of Light Between Air and Water

"LA represents a ray of light propagated in air, falling obliquely upon the surface of the water at…

### Refraction of Light Between Water and Air

"If the ray passes in the opposite direction, i.e., from water into air, the process is the reverse…

### Refraction as seen by the Human Eye

"If the coin were to be observed in an empty pan and then watched as the pan was filled with water,…

### Refraction, water

"Suppose the rod a, to be set with one half of its length below the surface of the water and the other…

### Spectrometer

"An instrument used chiefly to measure the angular deviation of light rays in passing through a prism,…

### Straight Prisms

"Condensing Straight Prisms.—These, either by reflexion or refraction or both, cause a ray fr…