The law of refraction is also known as :
Snell’s law
The second law of refraction states that, for a given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant: \( \frac{\sin i}{\sin r} = \text{constant} \).
This relation, \( n_{1} \sin i = n_{2} \sin r \), was stated by Willebrord Snell and is therefore called Snell’s law.
Brewster’s law deals with polarisation by reflection, while Huygens’ and Fresnel’s work concern the wave theory and diffraction of light.
Hence, Snell’s law.
A convex lens is used as a :
Who was the first one to use a glass prism to obtain the spectrum of sunlight?
Twinkling of stars is due to:
In which a convex mirror is used?
A. Rear View mirrors in vehicles
B. Glass windows
C. Makeup Mirror
D. Kaleidoscope
An object is placed 10 cm in front of a lens. The image formed is real, inverted and of same size as the object. What is the focal length and nature of the lens?
The power of a lens is -2.5 D. The type of lens and its focal length are respectively: