Prism Dispersion: Light Bending Angles
When white light enters a prism, it splits into its constituent colors. This splitting is known as dispersion. Each color bends at a different angle because the prism's refractive index varies for different wavelengths of light.
The amount of bending (angle of deviation) is inversely related to the wavelength of light. Specifically:
- Violet light has the shortest wavelength in the visible spectrum. It experiences the highest refractive index (\(n_{violet}\)) and therefore bends the most.
- Red light has the longest wavelength. It experiences the lowest refractive index (\(n_{red}\)) and therefore bends the least.
The colors of visible light, in order of decreasing wavelength (and thus increasing bending), are Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROYGBIV).
Based on this principle:
- Red bends the least.
- Violet bends the most.
Similar Questions
An object is placed at a distance of 20 cm from a convex lens of focal length 10 cm. The image is formed at a distance of:
When white light is dispersed by a glass prism into seven colours, out of the following colours which colour will be deviated the least?
When a ray of light travels from a denser medium to a rarer medium, it bends ________.
- If the angle of incidence formed on a concave mirror at a point is 30 ° then the angle of reflection will be:
- The line joining the centre of curvature and the pole of a given spherical mirror is called __________.
- A concave mirror is used in torches and car headlights because it:
- A symmetrical biconvex lens of focal length '\(f\)' is cut into four identical pieces along and perpendicular to its principal axis The focal length of each of four pieces is
- Complete the statement with correct option.
In dispersion without deviation,_________________ - A thin prism $P_1$ of angle $4^\circ$ and refractive index 1.54 is combined with another thin prism $P_2$ of refractive index 1.72 to produce dispersion without deviation. The angle of $P_2$ is
Which of the following is NOT the use of a concave mirror?
Important Questions from Optics
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:
