For range of 44 km. What should be the suitable wavelength if tower is at a height of 400m.

The wavelength range of white light is 400 nm to 700 nm. What will be the wavelength range if light passes through water? Refractive index of water is 1.33.

An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 km ?

From 40 m away from the foot of a tower , the angle of elevation of the top of the tower is 60^(@) .What is the height of the tower ?

At a point 20 m away from the foot of a tower, the angle of elevation of the top of the tower is 30^@ The height of the tower is

From a point 20 m away from the foot of a tower, the angle of elevation of the top of the tower is 30^(@) . The height of the tower is

(a) For the telescope described what is the separation between the objective lens and eye piece ? (b) If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens ? (c ) What is the height of the final image of the tower if it is formed at 25 cm ?

80 m away from the foot of the tower, the angle of elevation of the top of the tower is 60^@ . What is the height (in metres) of the tower?

The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is 60^(@) and the angle of elevation of the top of the second tower from the foot of the first tower is 30^(@). The distance between the two towers is m times the height of the shorter tower. What is m equal to ?