Question:
The students in a class took a thick sheet of cardboard and made a small hole in its centre. Sunlight was allowed to fall on this small hole and they obtained a narrow beam of white light. A glass prism was taken and this white light was allowed to fall on one of its faces. The prism was turned slowly until the light that comes out of the opposite face of the prism appeared on the nearby screen. They studied this beautiful band of light and concluded that it is a spectrum of white light
(i) Give any one more instance in which this type of spectrum is observed.
The students in a class took a thick sheet of cardboard and made a small hole in its centre. Sunlight was allowed to fall on this small hole and they obtained a narrow beam of white light. A glass prism was taken and this white light was allowed to fall on one of its faces. The prism was turned slowly until the light that comes out of the opposite face of the prism appeared on the nearby screen. They studied this beautiful band of light and concluded that it is a spectrum of white light
(i) Give any one more instance in which this type of spectrum is observed.
(i) Give any one more instance in which this type of spectrum is observed.
Show Hint
Spectra of white light are formed when light passes through a medium like a prism or water droplets, separating the colors.
Updated On: Jan 13, 2026
Hide Solution
Verified By Collegedunia
Solution and Explanation
Another instance in which a spectrum similar to the one observed with a glass prism is seen is when white light passes through water droplets in the atmosphere during a rainstorm, forming a rainbow. This process is called dispersion, where the different colors of light are separated due to their different wavelengths.
Was this answer helpful?
0
0
Top Questions on Optics
- A thin convex lens of focal length \( 5 \) cm and a thin concave lens of focal length \( 4 \) cm are combined together (without any gap), and this combination has magnification \( m_1 \) when an object is placed \( 10 \) cm before the convex lens.
Keeping the positions of the convex lens and the object undisturbed, a gap of \( 1 \) cm is introduced between the lenses by moving the concave lens away. This leads to a change in magnification of the total lens system to \( m_2 \).
The value of \( \dfrac{m_1}{m_2} \) is
- A thin prism with angle 5° of refractive index 1.72 is combined with another prism of refractive index 1.9 to produce dispersion without deviation. The angle of second prism is :
The strain-stress plot for materials A, B, C and D is shown in the figure. Which material has the largest Young's modulus?
- When you look at an object very close to your eyes, the:
- A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position of object and position of image will be, respectively :
View More Questions
Questions Asked in CBSE X exam
- The pattern of magnetic field due to a current carrying wire depends upon the shape made by that wire. Justify.
- CBSE Class X - 2026
- Magnetic Effects of Current and Magnetism
- (a) Why did many Europeans migrate to America after the sixteenth century? Explain. OR (b) How did trade and long distance travel contribute to the spread of diseases during the ancient period? Explain.
- A conical cavity of maximum volume is carved out from a wooden solid hemisphere of radius 10 cm. Curved surface area of the cavity carved out is (use \(\pi = 3.14\))
- CBSE Class X - 2026
- Surface Areas and Volumes
- Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells.
Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.- CBSE Class X - 2026
- Life Processes
- The dimensions of a window are 156 cm \(\times\) 216 cm. Arjun wants to put grill on the window creating complete squares of maximum size. Determine the side length of the square and hence find the number of squares formed.
- CBSE Class X - 2026
- Real Numbers
View More Questions