The frequency order of for \(γ-rays\ (b), X–rays\ (a), UV–rays\ (c)\):
The frequency order of for \(γ-rays\ (b), X–rays\ (a), UV–rays\ (c)\):
\(b>a>c\)
\(a>b>c\)
\(c>b>a\)
\(a>c>b\)
The Correct Option is A
Solution and Explanation
In the electromagnetic spectrum, gamma (γ)-rays have the highest frequency and shortest wavelength, followed by X-rays and then ultraviolet (UV) rays.
So, the correct order is: gamma-rays (b) > X-rays (a) > UV-rays (c)
Top Questions on Electromagnetic Waves
- How is an electromagnetic wave produced?
- CBSE CLASS XII - 2025
- Physics
- Electromagnetic Waves
- An electromagnetic wave is travelling in vertically upward direction. At an instant, its electric field vector points in west direction. In which direction does the magnetic field vector point at that instant?
- CBSE CLASS XII - 2025
- Physics
- Electromagnetic Waves
- Estimate the ratio of shortest wavelength of radio waves to the longest wavelength of gamma waves.
- CBSE CLASS XII - 2025
- Physics
- Electromagnetic Waves
- X-rays are more harmful to human beings than ultraviolet radiations because X-rays:
- CBSE CLASS XII - 2025
- Physics
- Electromagnetic Waves
- The electric field in a plane electromagnetic wave is given by \(E_z = 60 \cos(5x + 1.5 \times 10^{10} t)\) V/m. Then expression for the corresponding magnetic field (\(B_y\)) is (here subscripts denote the direction of the field) is:
- NEET (UG) - 2025
- Physics
- Electromagnetic Waves
Questions Asked in NEET exam
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
- NEET (UG) - 2025
- Moment Of Inertia
Predict the major product $ P $ in the following sequence of reactions:
(i) HBr, benzoyl peroxide
(ii) KCN
(iii) Na(Hg), $C_{2}H_{5}OH$- NEET (UG) - 2025
- Organic Chemistry
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
- NEET (UG) - 2025
- Electromagnetic Induction and Inductance
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
- Consider the diameter of a spherical object being measured with the help of a Vernier Callipers. Suppose its 10 Vernier Scale Divisions (V.S.D.) are equal to its 9 Main Scale Divisions (M.S.D.). The least count in the M.S. is 0.1 cm and the zero of V.S. is at -0.1 cm when the jaws of Vernier callipers are closed. If the main scale reading for the diameter is \(M = 5\) cm and the number of coinciding vernier division is 8, the measured diameter after zero error correction, is:
- NEET (UG) - 2025
- Measurement of length
Concepts Used:
Electromagnetic waves
The waves that are produced when an electric field comes into contact with a magnetic field are known as Electromagnetic Waves or EM waves. The constitution of an oscillating magnetic field and electric fields gives rise to electromagnetic waves.
Types of Electromagnetic Waves:
Electromagnetic waves can be grouped according to the direction of disturbance in them and according to the range of their frequency. Recall that a wave transfers energy from one point to another point in space. That means there are two things going on: the disturbance that defines a wave, and the propagation of wave. In this context the waves are grouped into the following two categories:
- Longitudinal waves: A wave is called a longitudinal wave when the disturbances in the wave are parallel to the direction of propagation of the wave. For example, sound waves are longitudinal waves because the change of pressure occurs parallel to the direction of wave propagation.
- Transverse waves: A wave is called a transverse wave when the disturbances in the wave are perpendicular (at right angles) to the direction of propagation of the wave.