You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Moving Object, Stationary Plane Mirror

When a plane ...

Question

When a plane mirror is placed horizontally on a level ground at a distance of $60 m$ from the front of a tower, the top of the tower and its image in the mirror subtend an angle of $90^{\circ}$ at the eye. The height of the tower is :

30 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

60 m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

90 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

120 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $60 m$
From the figure it is clear that,

$\frac{h}{60} = tan 45^{\circ}$

$h = 60 c m$

Suggest Corrections

Similar questions

When a plane mirror is placed horizontally on a level ground at a distance of 60m from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of at the eye. The height of the tower will b

[CPMT 1984]

[CPMT 1984]

Q. When a plane mirror is placed horizontally on level ground at a distance of

60 m

from the foot of a tower, the top of the tower and its image in the mirror subtends an angle of

90^{\circ}

at the corner of the mirror nearer to the foot of tower. The height of the tower is

Q. When a plane mirror

A B

is placed horizontally on level ground, with

B

at a distance of

60 m

from the foot of a tower, the top of the tower and its image in the mirror subtends, an angle of

90^{\circ}

B

. The height of the tower is

Q. When a plane mirror is placed horizontally on level ground at a distance of

60 m

from the foot of a tower, the ray coming from the top of the tower and its reflected ray from the mirror subtends an angle of 90

^{\circ}

. What is the height of the tower?

Join BYJU'S Learning Program

When a plane mirror is placed horizontally on a level ground at a distance of 60 m from the front of a tower, the top of the tower and its image in the mirror subtend an angle of 90∘ at the eye. The height of the tower is :

The correct option is B 60 mFrom the figure it is clear that, h60=tan45∘h=60cm

When a plane mirror is placed horizontally on a level ground at a distance of $60 m$ from the front of a tower, the top of the tower and its image in the mirror subtend an angle of $90^{\circ}$ at the eye. The height of the tower is :

The correct option is B $60 m$
From the figure it is clear that,

$\frac{h}{60} = tan 45^{\circ}$

$h = 60 c m$