[Solved] What Is The Unit Of Wavelength?
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Question
Download Solution PDFWhat is the unit of wavelength?- m
- m-1
- m2
- It depend on the type of waves
Answer (Detailed Solution Below)
Option 1 : m Crack with India's Super Teachers FREE Demo Classes Available* Explore Supercoaching For FREE
Free Tests View all Free tests > Free MNS GK 11 September 2020 Questions 7.5 K Users 50 Questions 50 Marks 30 Mins Start Now Detailed Solution
Download Solution PDFCONCEPT:
- Wavelength (λ): The minimum distance of separation between two particles that are in the same phase is called a wavelength.
EXPLANATION:
- From the definition, it is clear that wavelength is a distance.
- So its unit will be the same as the unit of length.
- Hence unit of wavelength is meter.
- So the correct answer is option 1.
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Q1.The frequency (f), wavelength (λ) and speed (v) of a sound wave are related as Q2.Which of the following has smallest wavelength Q3.Which of the following electromagnetic wave has longest wavelength? Q4.Most X-rays have a wavelength ranging between Q5.The given displacement-time (d-t) graph represents a disturbance traveling with a speed of 1200 m/s. The wavelength of the disturbance is Q6.Which of the following wave has the shortest wavelength range? Q7.What is the relation between velocity, wavelength and frequency? Q8.The frequency of vibration of a string is 100 Hz. Then its period of vibration is: Q9.A wave is described by y(x, t) = 0.2 sin (3x + 12t) where x is in metres, y is in centimetres and t is in seconds. The wavelength is Q10.A boat at anchor is rocked by waves whose crests are 120 m apart and velocity is 20 ms-1. The boat bounces up once in every:More Waves Questions
Q1.A long stretched string lies along the positive x-axis and consists of three consecutive segments joined smoothly end to end. Segment I (x < 0) has linear mass density μ₁. Segment II (0 < x < L) has linear mass density μ₂. Segment III (x > L) has linear mass density μ₃. All three segments are under the same constant tension T. The string is perfectly flexible, continuous at the junctions, and energy losses are negligible. A harmonic transverse wave is generated in Segment I and travels towards the right. The incident wave in Segment I is given by y = A sin(ωt − k₁x) where ω is fixed by the source and k₁ is the wave number in Segment I. The wave undergoes reflection and transmission at x = 0, and the transmitted wave in Segment II undergoes further reflection and transmission at x = L. (Assume μ₂ is greater than μ₁, μ₃ is less than μ₂ & No energy loss occurs at any junction) Which of the following s Q2.A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of: Q3.Transverse waves are produced when the particles of a medium vibrate at right angles to the direction in which the wave travels. Such waves move forward as a series of crests (high points) and troughs (low points). Longitudinal waves occur when the particles vibrate along the same direction as the wave’s motion. These waves travel as compressions and rarefactions, which is why they are often called pressure waves. Examples include sound waves in air and waves formed along a spring. A transverse wave consists of: Q4.If sound velocity is 1500 m/s in water, what is the minimum distance of an obstacle to hear an echo from a sound producing point? Q5.Which of the following statements is true regarding the speed of sound in gases? Q6.Which of the following statements is true regarding the speed of sound in gases? Q7.Which one of the following statements is NOT correct about sound? Q8.Amit hits a piano key softly first and then harder. What changes in the sound properties will be observed in the second case? Q9.Read the following statements and choose correct option (Assertion) (A): A drum produces a low-pitched sound while a piano produces a high-pitched sound. Reasoning (R): The amplitude of vibrations of the vibrating object determines the loudness of sound. Q10.The place inside the earth's crust where the earthquake originates is called as Suggested Test Series View All > General Knowledge for All Defence Exams 317 Total Tests with
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Q1.The electric field E is measured at the point P(0, 0, d) for different charge configurations. The dependence of E on distance d varies with the nature of the charge distribution. Match the relations given in Column I with the corresponding charge distributions in Column II. Column I (Dependence of E on d) Column II (Charge Distribution) (P) E is independent of d (1) Point charge q placed at the origin (Q) E ∝ 1/d (2) Electric dipole with charges +q at (0,0,l) and −q at (0,0,−l), where 2l ≪ d (R) E ∝ 1/d2 (3) Infinite straight line charge along the x-axis with linear charge density λ (S) E ∝ 1/d3 (4) Two infinite parallel line charges along the x-axis at z = ±l carrying +λ and −λ respectively, with 2l ≪ d (5) Infinite plane sheet of charge lying in the x–y plane with uniform surface charge density σ Q2.Column I shows four different cases of the standard Young’s double-slit experiment, with the screen placed far away from the two slits S1 and S2. In all cases, the following conditions hold: ⇒ S1P0 = S2P0 ⇒ S1P1 − S2P1 = λ/4 ⇒ S1P2 − S2P2 = λ/3 where λ is the wavelength of the light used. In cases B, C, and D, a transparent sheet of refractive index μ and thickness t is placed in front of slit S2. The thickness of the sheet is different in each of these cases. Let δ(P) denote the phase difference between the light waves reaching a point P on the screen from the two slits, and let I(P) denote the intensity at that point. Match each situation given in Column I with the correct statement(s) in Column II. Column I Column II (A) (p) δ(P0) = 0 (B) (q) δ(P1) = 0 (C) (r) I(P1) = 0 (D) (s) I(P0) > I(P1) (t) I(P2) > I(P Q3.An alternating voltage source is applied to different electrical loads. The instantaneous voltage of the source is given by V(t) = V0 sin(ωt + φ0). Each load responds with a current of the form: i(t) = I0 sin(ωt + φ0 + φ) where I0 depends on the impedance magnitude Z, φ is the phase difference between current and voltage, ω is the angular frequency of the source Match each load in List–I with the correct current expression in List–II. List–I and List–II List–I (Load) List–II (Current response) A. Pure resistor R 1. i(t) = (V0/R) sin(ωt + φ0) B. Pure inductor L 2. i(t) = (V0 / (ωL)) sin(ωt + φ0 − 90°) C. Pure capacitor C 3. i(t) = (V0 ωC) sin(ωt + φ0 + 90°) D. Series RL circuit 4. i(t) = (V0 / √(R² Q4.A long stretched string lies along the positive x-axis and consists of three consecutive segments joined smoothly end to end. Segment I (x < 0) has linear mass density μ₁. Segment II (0 < x < L) has linear mass density μ₂. Segment III (x > L) has linear mass density μ₃. All three segments are under the same constant tension T. The string is perfectly flexible, continuous at the junctions, and energy losses are negligible. A harmonic transverse wave is generated in Segment I and travels towards the right. The incident wave in Segment I is given by y = A sin(ωt − k₁x) where ω is fixed by the source and k₁ is the wave number in Segment I. The wave undergoes reflection and transmission at x = 0, and the transmitted wave in Segment II undergoes further reflection and transmission at x = L. (Assume μ₂ is greater than μ₁, μ₃ is less than μ₂ & No energy loss occurs at any junction) Which of the following s Q5.A thin conducting rectangular loop of mass m and resistance R is placed on a smooth horizontal table. The loop can slide without friction along the x-axis. A uniform magnetic field of magnitude B, directed vertically upward, exists only in the region 0 < x < L. Outside this region, the magnetic field is zero. Initially, the loop is entirely outside the magnetic field region and is given a horizontal velocity v0 towards the right. The plane of the loop remains perpendicular to the magnetic field at all times. The length of the loop along the direction of motion is less than L.As the loop moves, parts of it may enter or leave the magnetic field region, inducing currents and magnetic forces. Consider the motion of the loop from the instant it starts entering the magnetic field until it completely exits the field. Which of the following statements are correct? Q6.The potential difference between two points A and B is 6 V. The amount of work done in moving a charge of 3.0 coulombs from A to B is Q7.Two convex lens each of focal length f1 and f2 are placed at a distance 'd'. The chromatic aberration and spherical aberration is minimum. The ratio \(\rm \frac{f_{1}}{f_{2}}\) is: Q8.A hero of a stunt film fires 50g bullets from a machine gun, each at Speed of 1.0 km/s. 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[PDF] λ = Wavelength (units: Km, M, Cm, µm, Nm)