Match List I with List II
List I List II A. Microwaves I. Physiotherapy B. UV rays II. Treatment of cancer C. Infra-red rays III. Lasik eye surgery D. X-rays IV. Aircraft navigation
Choose the correct answer from the options given below:
Match List I with List II
| List I | List II | ||
| A. | Microwaves | I. | Physiotherapy |
| B. | UV rays | II. | Treatment of cancer |
| C. | Infra-red rays | III. | Lasik eye surgery |
| D. | X-rays | IV. | Aircraft navigation |
Choose the correct answer from the options given below:
Show Hint
- A - IV, B - I, C - II, D - III
- A - II, B - IV, C - III, D - I
- A - IV, B - III, C - I, D - II
- A - III, B - II, C - I, D - IV
The Correct Option is C
Solution and Explanation
- Microwaves are used in aircraft navigation (A-IV).
- UV rays are used for Lasik eye surgery (B-III).
- Infra-red rays are used in physiotherapy (C-I).
- X-rays are used for the treatment of cancer (D-II).
Top Questions on Electromagnetic waves
- 3 capacitors of capacitance \( 12 \mu \text{F} \) each is connected in series. If the voltage is 12V, what charge is drawn from the cell?
- KEAM - 2025
- Physics
- Electromagnetic waves
The dimension of $ \sqrt{\frac{\mu_0}{\epsilon_0}} $ is equal to that of: (Where $ \mu_0 $ is the vacuum permeability and $ \epsilon_0 $ is the vacuum permittivity)
- JEE Main - 2025
- Physics
- Electromagnetic waves
The unit of $ \sqrt{\frac{2I}{\epsilon_0 c}} $ is: (Where $ I $ is the intensity of an electromagnetic wave, and $ c $ is the speed of light)
- JEE Main - 2025
- Physics
- Electromagnetic waves
- Vibration of atoms and molecules produce electromagnetic radiation in the region of:
- KEAM - 2025
- Physics
- Electromagnetic waves
- Relations between the speed of X-ray, gamma-ray, and UV rays when they travel in a vacuum.
- KEAM - 2025
- Physics
- Electromagnetic waves
Questions Asked in JEE Main exam
Let $ [.] $ denote the greatest integer function. If $$ \int_1^e \frac{1}{x e^x} dx = \alpha - \log 2, \quad \text{then} \quad \alpha^2 \text{ is equal to:} $$
- JEE Main - 2025
- Calculus
If the area of the region $$ \{(x, y): |4 - x^2| \leq y \leq x^2, y \geq 0\} $$ is $ \frac{80\sqrt{2}}{\alpha - \beta} $, $ \alpha, \beta \in \mathbb{N} $, then $ \alpha + \beta $ is equal to:
- JEE Main - 2025
- Area under Simple Curves
Three distinct numbers are selected randomly from the set $ \{1, 2, 3, ..., 40\} $. If the probability that the selected numbers are in an increasing G.P. is $ \frac{m}{n} $, where $ \gcd(m, n) = 1 $, then $ m + n $ is equal to:
- JEE Main - 2025
- Probability
- The absolute difference between the squares of the radii of the two circles passing through the point \( (-9, 4) \) and touching the lines \( x + y = 3 \) and \( x - y = 3 \), is equal to:
- JEE Main - 2025
- Circles
- A light wave is propagating with plane wave fronts of the type \( x + y + z = \text{constant} \). The angle made by the direction of wave propagation with the \( x \)-axis is:
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.