Question:
Complete the following: When a ray of light passes from a denser to a rarer medium, its wavelength __________.
Complete the following: When a ray of light passes from a denser to a rarer medium, its wavelength __________.
Show Hint
Frequency is the "DNA" of a wave; it never changes when the medium changes. Speed and wavelength change together. Denser to Rarer: Speed and Wavelength both INcrease.
Updated On: Mar 10, 2026
- decreases
- increases
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
When a wave, including light, passes from one medium to another, its frequency remains constant. The speed of light is greater in a rarer medium than in a denser medium. The relationship between speed (\(v\)), frequency (\(f\)), and wavelength (\(\lambda\)) is \(v = f\lambda\). Since \(f\) is constant and \(v\) increases as light enters the rarer medium, the wavelength (\(\lambda\)) must also increase to maintain the equality.
Was this answer helpful?
0
0
Top ICSE Class X board Physics Questions
- For a body to be in dynamic equilibrium, its:
- The energy transformation taking place during photosynthesis in plants is:
- The Velocity Ratio (VR) of a block and tackle system of two pulleys with the effort in the upward direction is:
- From the figure given below, the refractive index of medium B with respect to medium A (\(_{A}\mu_{B}\)) is:
- When a blackened bulb thermometer is moved beyond the red region of the visible spectrum, there is a rapid rise in the temperature. This is due to the presence of:
View More Questions
Top ICSE Class X board Refraction of Light Questions
- From the figure given below, the refractive index of medium B with respect to medium A (\(_{A}\mu_{B}\)) is:
- A monochromatic ray strikes the surface of identical prisms (A, B and C) at different angles of incidence. The diagram below shows their refracted rays. Study the path of these refracted rays and identify in which of the diagrams
(a) the angle of incidence is maximum.
(b) the angle of incidence is minimum.
(c) the angle of incidence is equal to the angle of emergence.
- A ray of light enters a glass block from air and comes out from the opposite surface. If the angle of refraction at the first surface is not the same as the angle of incidence at the second surface, then:
(a) What is the product of the ratio \(\frac{\sin i}{\sin r}\) at the first surface and at the second surface?
(b) State whether the opposite surfaces are parallel or not parallel.
(c) How did you reach the conclusion in (b) above?
- A type of glass block has a refractive index of 1.8.
(a) Calculate the speed of light in this glass. (Given speed of light in air \(c = 3 \times 10^8\) ms\(^{-1}\))
(b) If the width of this block is doubled, then what will be the speed of light in the block?
- (a) Name the electromagnetic radiation used to detect fake currency.
(b) Redraw the diagram given below and complete the path of the light ray AB through the glass prism till it emerges out of the prism. Critical angle of the glass is 42\(^\circ\).
Top ICSE Class X board Questions
- "स्वस्थ जीवन के लिए संतुलित भोजन, व्यायाम तथा खेलकूद बहुत आवश्यक होता है" इस विषय को आधार बनाते हुए एक लेख लिखिए।
- पुस्तकालय (Library) का हमारे जीवन में बहुत महत्व होता है। आप अपने विद्यालय के पुस्तकालय में जाकर किस प्रकार की पुस्तकों को पढ़ना पसंद करते हैं। अपनी प्रिय पुस्तक का वर्णन करते हुए लेख लिखिए।
- अच्छी संगति हमारे जीवन में अनेक बदलाव ला सकती है। हम अक्सर अपने मित्रों की बातों से प्रभावित होकर उनका अनुकरण (follow) करने लगते हैं। अच्छी संगति के लाभ बताते हुए एक सारपूर्ण लेख लिखिए।
- ‘मैंने यह निर्णय लिया कि भविष्य में ऐसी गलती दुबारा नहीं होगी’ इस वाक्य से अंत करते हुए अपने जीवन की कोई यादगार घटना या मौलिक कहानी लिखिए।
नीचे दिए गए चित्र को ध्यान से देखिए और चित्र को आधार बनाकर कोई लेख, घटना अथवा कहानी लिखिए जिसका सीधा व स्पष्ट संबंध चित्र से होना चाहिए।
View More Questions