When white light is dispersed by a glass prism into seven colours, out of the following colours which colour will be
deviated the least?
Yellow
When white light passes through a glass prism, it is dispersed into its component colors. This happens because different colors of light have different wavelengths and thus refract differently when entering and exiting materials like glass. This process is known as dispersion.
The degree of deviation is dependent on the wavelength of the color; shorter wavelengths are generally refracted more than longer ones. In the visible spectrum, violet light has the shortest wavelength and is deviated the most, while red light has the longest wavelength and is deviated the least. Yellow light has a relatively longer wavelength compared to colors like blue and indigo, leading to less deviation.
Thus, among the given options of Blue, Indigo, Yellow, and Green, yellow light will be deviated the least when white light is dispersed by a glass prism.
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 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 __________.
- When white light passes through a prism, different colours of light bend through different angles. Which colour bends the least and which bends the most?
- 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:
