MCQ
The radius of a wavefront as the waves propagate:
- ADecreases
- ✓Increases
- CBecomes zero
- DSometimes decreases and sometimes increases.
✓
Answer
Correct option: B.
Increases
As the waves propagates, it goes on creating secondary sources of light, resulting in increase in its radius.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In Bainbridge mass spectrograph a potential difference of $1000 V$ is applied between two plates distant $1$ cm apart and magnetic field in $B = 1T$. The velocity of undeflected positive ions in m/s from the velocity selector is
→Which of the following could not produce a virtual image
The reading in the ideal voltmeter $(V)$ shown in the given circuit diagram is :
→$A$ wire of length $L$ and $3$ identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire is raised by $\Delta T$ in time $t. N$ number of similar cells is now connected in series with a wire of the same material and cross section but of length $2L$. The temperature of the wire is raised by the same amount $\Delta T$ in the same time $t$. The value of $N$ is :
→Expression for an electric field is given by $\vec{E}=4000 x^2 \hat{i} \frac{V}{m}$. The electric flux through the cube of side $20\,cm$ when placed in electric field (as shown in the figure) is $.........V cm$.
→An electric dipole is kept in non-uniform elecric field. it experiences?
An amplitude modulated signal is plotted below Which one of the following best described the above signal?
Consider the combination of resistors as shown in figure and pick out the correct statement
When is hydrogen stable?
Consider the following statements regarding a charged particle in a magnetic field . Which of the statements are true :