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A ray of light suffers minimum deviation through a prism of refractive index root 2. What is the angle of prism if the angle of incidence is double the angle of refraction within the prism?
05
Oct
A ray of light suffers minimum deviation through a prism of refractive index root 2. What is the angle of prism if the angle of incidence is double the angle of refraction within the prism? A ray of light suffers minimum deviation through a prism of refractive index root 2. What is the angle of [...]
Light is incident normally on face AB of a prism as shown in figure. A liquid of refractive index mu is placed on face AC of the prism. The prism is made of glass of refractive index 3/2.
05
Oct
Light is incident normally on face AB of a prism as shown in figure. A liquid of refractive index mu is placed on face AC of the prism. The prism is made of glass of refractive index 3/2. Light is incident normally on face AB of a prism as shown in figure. A liquid of [...]
From the point on a bridge across a river, the angles of depressions of the banks on opposite sides of the river are 30 degree and 45 degree , respectively. If the bridge is at a height of 3 m from the banks, find the width of the river.
05
Oct
From the point on a bridge across a river, the angles of depressions of the banks on opposite sides of the river are 30 degree and 45 degree , respectively. If the bridge is at a height of 3 m from the banks, find the width of the river. find the width of the river. [...]
A horizontal ray of light passes through a prism whose apex angle is 4 and then strikes a vertical mirror M as shown in figure. For the ray to become horizontal after reflection, find the angle by which
05
Oct
A horizontal ray of light passes through a prism whose apex angle is 4 and then strikes a vertical mirror M as shown in figure. For the ray to become horizontal after reflection, find the angle by which A horizontal ray of light passes through a prism whose apex angle is 4 and then strikes [...]
A prism is made of glass of refractive index 1.5. If the angle of minimum deviation is equal to the refracting angle of the prism, calculate the angle of the prism.
05
Oct
A prism is made of glass of refractive index 1.5. If the angle of minimum deviation is equal to the refracting angle of the prism, calculate the angle of the prism. A prism is made of glass of refractive index 1.5. If the angle of minimum deviation is equal to the refracting angle of the [...]
The angles of depression of the top and bottom of 8 m tall building from the top of a multi-storeyed building are 30 degree and 45 degree respectively. Find the height of the multi-storeyed building and the distance between the two buildings.
05
Oct
The angles of depression of the top and bottom of 8 m tall building from the top of a multi-storeyed building are 30 degree and 45 degree respectively. Find the height of the multi-storeyed building and the distance between the two buildings. The angle of elevation from top of tower from point on ground which [...]
The shadow of a tower standing on a level ground is found to be 40 m longer when Suns altitude is 30 than when it was 60. Find the height of the tower.
05
Oct
The shadow of a tower standing on a level ground is found to be 40 m longer when Suns altitude is 30 than when it was 60. Find the height of the tower. The shadow of a tower standing on a level ground is found to be 40 m longer when Suns altitude is 30 [...]
An observer 1.5 m tall is 28.5 m away from a chimney. The angle of elevation of the top of the chimney from her eyes is 45 degree The height of the chimney is ?
05
Oct
An observer 1.5 m tall is 28.5 m away from a chimney. The angle of elevation of the top of the chimney from her eyes is 45 degree The height of the chimney is ? An observer 1.5 m tall is 28.5 m away from a chimney. The angle of elevation of the top of [...]
An electrician has to repair an electric fault on a pole of height 5m. She needs to reach a point 1.3m below the top of the pole to undertake the repair work. What should be the length of the ladder that she should use which, when inclined at an angle of 60 degree to the horizontal, would enable her to reach the required position? Also, how far the foot of the pole should she place the foot of the ladder? ( You may take root 3 =1.73).
05
Oct
An electrician has to repair an electric fault on a pole of height 5m. She needs to reach a point 1.3m below the top of the pole to undertake the repair work. What should be the length of the ladder that she should use which, when inclined at an angle of 60 degree to the [...]
A tower stands vertically on the ground from a point on the ground which is 15 M away from the foot of the tower and the angle of elevation of the top of the tower is found to be 60 degree find the height of the tower
05
Oct
A tower stands vertically on the ground from a point on the ground which is 15 M away from the foot of the tower and the angle of elevation of the top of the tower is found to be 60 degree find the height of the tower The angle of elevation from top of tower [...]