The objective of a telescope has a focal length of 1.2m .It is used to view a 10.0m tall tower 2km away. What is the height of the image of the tower formed by the objective?

(A) 2mm

(B) 4mm

(C)6mm

(D) 8mm

You are given two converging lenses of focal lengths 1.25 cm and 5cm to design a compaound microscope.if it is desired to have a magnification of 30, find out the separation between the object and the eyepiece. or A small telescope has an objective lens of focal length 150 cm and eyepiece of focal length 5 cm. What is the magnifying of the telescope for viewing distant objects on normal adjustment ? 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 3km away, what is the height of the image of the tower formed by the objective lens ?

A telescope has an objective lens of focal length 200cm and an eye piece with focal length 2cm . If this telescope is used to see a 50 meter tall building at a distance of 2km, what is the height of the image of the building formed by the objective lens?

A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0 cm . In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 xx 10^(6)m . and the radius of the lunar orbit round the earth is 3.8 xx 10^(8) m .

Define magnifying power of a telescope. Write its expression. A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 5 cm. If this telescope is used to view a 100 m high tower 3 km away, find the height of the final image when it is formed 25 cm away from the eye piece.

A gaint refrecting telescope at an observatory has an objective lens of focal length 15 m . If an eye piece lens of focal length 1 cm is used, find the angular magnification of the telescope. If this telescope is used to view the moon, what is the diameter of image of moon formed by objective lens ? The diameter of the moon is 3.42 xx 10^6 m and radius of lunar orbit is 3.8 xx 10^8 m .

The eyepice of an astronomicasl telescope has a focasl length of 10 cm. The telescope is focussed for normal vision of distant objects when the tube length is 1.0 m. find the focal length of the bjective and the magnifying power of the telescope.

A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm . If a 50 m tall tower at a distance of 1 km is observed through this telescope in normal setting , the angle formed by the image of the tower is x , then x is close to ( in degree )

Object AB is placed on the axis of a concave mirror of focal length 10cm. End A of the object is at 30cm from the mirror. Find the length of the image a. if length of object is 5cm. b. if length of object is 1 mm.

An object 2 mm high is placed 150 mm from a concave mirror of focal length 5 cm. Find the position (in mm) and size (in mm) of the image.

Angular magnification of telescope if focal length of objective and eye lenses are 10 cm and 10 mm respectively and tube length is 11cm: