Which of the following statements related to dispersion are true? (1) Red light bends the most when passing through a glass prism. (2) The angle of deviation is the same for all colours. (3) Dispersion is one of the phenomena responsible for the formation of a rainbow. (4) The speed of light decreases as the light goes from air into the prism.
Both statements 3 and 4 only
Statement (1) is incorrect: violet light bends the most through a prism, red light bends the least.
Statement (2) is incorrect: different colours have different angles of deviation because they have different wavelengths and speeds inside the prism.
Statement (3) is correct: dispersion (splitting of white light into its component colours) is one of the phenomena responsible for the formation of a rainbow.
Statement (4) is correct: light slows down as it passes from a rarer medium (air) into a denser medium (glass prism).
Hence, only statements 3 and 4 are true, So, this is the correct answer.
Similar Questions
To get a virtual, erect and enlarged image using a spherical mirror, the object must be placed _____________.
If a lens produces an image twice as tall as the object, what is the magnification produced by the lens?
A scientist wants to demonstrate why the sky appears blue during the day and reddish at sunset using a glass tank of water, a flashlight, and a small amount of milk. Which setup best demonstrates light scattering similar to that observed in the atmosphere?
When an object is placed at 2F1 of a convex lens, where is the image formed?
The measure of an image's clarity is called _________, whereas _________ is the brightness difference between object parts.
Which of the following best describes the power of accommodation of the human eye?
An object is placed 15 cm from a concave lens of focal length 10 cm. What is the nature and position of the image formed by the lens?
With ageing, the power of accommodation of the human eye decreases, causing difficulty in viewing nearby objects clearly. This defect is known as:
Why does the sky appear blue to human observers during daytime?
Which of the following best describes the image formed by a concave mirror when the object is placed just beyond the focal point but before the center of curvature?
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
What is the reason for formation of Mirage in desert?
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?
