Question

A point object is moving towards a plane mirror as shown in figure. Choose the correct options.

• A. Speed of image is also $v$
• B. Image velocity will also make an angle $\theta$ with mirror
• C. Relative velocity between object and image is $2v$
• D. Relative velocity between object and image is $2v\sin \theta$

Answer 1

Answer: (A), (B), (D)

The correct options are
A Speed of image is also $v$
B Image velocity will also make an angle $\theta$ with mirror
D Relative velocity between object and image is $2v\sin \theta$

imege ohject dis. ab $|v|=|u|$

for plane mirror

$\frac{dv}{dt}=\frac{du}{dt}=V$

- Ohtion $A$ is correct

as $Li=\angle \gamma \therefore \mathrm{Log}{A}^{\prime }=LAgB$

$\therefore$ as $LIg{A}^{\prime }=LAgB$ (vertically opposite angles) $\therefore$ option $B^{\prime }$ is also correct

as both the object 8 the image is abproaching $V\cos (90-\theta )$ is so relative velocity $=2\vee \cos (90-\theta )=2v\sin \theta$

$\therefore$ obtion "D' is also correct

&

c' becames incorrect.