When white light falls on a glass prism, it splits into seven colours. The phenomena is known as:
dispersion
When white light passes through a glass prism, it splits into its constituent seven colors, typically seen as a spectrum ranging from red to violet. This phenomenon is called dispersion. Dispersion occurs because different colors of light have different wavelengths and, consequently, are refracted by varying amounts when passing through a medium like glass. This separation of light into colors results in the spectrum commonly associated with a rainbow.
- Deviation: Refers to the change in direction of light but does not specifically involve separation into different colors.
- Refraction: Is the bending of light as it passes from one medium to another, which is part of the process in dispersion but doesn’t account for the splitting into multiple colors on its own.
- Diffraction: Refers to the spreading of light as it encounters an obstacle or a slit, which is a different phenomenon from dispersion.
Thus, the correct answer is the second option: dispersion.
Similar Questions
- When an object is placed at infinity in front of a convex lens, the image formed is:
- A concave mirror is used in torches and car headlights because it:
- Which of the following statements correctly describes a double concave lens?
A convex mirror of focal length f (in air) is immersed in a liquid . The focal length of the mirror in liquid \(\left( {\mu - \frac{4}{3}} \right)\) will be:
The reflector of a searchlight is a:
If you look into a mirror and find that the image (your reflexion) is smaller than you, then the type of the mirror is:
The focal length of a concave mirror with a radius of curvature of 20.0 cm is:
Find the position of the image formed by a concave mirror when the object is placed between P and F?
A person holding a pen in his left-hand sees his reflection in the mirror holding the pen in his right hand. This is due to which of the following phenomena?
- Complete the statement with correct option.
In dispersion without deviation,_________________
Important Questions from Optics
Which among the following is used as a reflector in search lights?
The incident ray, the ray perpendicular to the point of incidence, and the reflected ray all lie________.
Which is the only event to prove that light is a transverse wave?
A. Scattering of light
B. Interference
C. Diffraction
D. Polarisation
In which a convex mirror is used?
A. Rear View mirrors in vehicles
B. Glass windows
C. Makeup Mirror
D. Kaleidoscope
Which mirror is preferred as a rear-view (wing) mirror in vehicles because of its wider field of view?
