Home
Class 12
PHYSICS
The optical telescope in the Vainu Bapp...

The optical telescope in the Vainu Bappu observatory at Kavalur has an objective lens of diameter 2.3.m. What is its angular resolution if the wavelenght of light used is 589 nm?

Text Solution

Verified by Experts

`a=2.3m,lambda=589xx10^(-9)m,0=?`
The equation for angular resolution is, `theta = (1.22 lambda)/(a)`
Substituting, `theta=(1.22xx589xx10^(-9))/(2.3)=321.4xx10^(-9)`
`theta = 321.4 xx 10^(-7) rad`
Note: The angular resolution of human eye is approximately. `3 xx 10^(-4)` rad
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED ( MULTIPLE CHOICE QUESTIONS : )|20 Videos

  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED SHORT ANSWER QUESTION|80 Videos

  • MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED - NUMERICAL PROBLEMS :|4 Videos

  • RECENT DEVELOPMENTS IN PHYSICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS (Short Answer Question)|6 Videos

Similar Questions

Explore conceptually related problems

a. A gaint refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece of focal length 1.0 cm is used, What is the angular magnification of the telescope ?

A small telescope has an objective lens of focal length 125 cm and an eyepiece of focal length 2 cm. What is the magnification of the telescope? What is the separation between the objective and eyepiece? Two stars separated by 1' will appear at what separation when viewed through the telescope?

A small telescope has an objective lens of focal length 150 cm and eyepiece of focal length 5 cm. What is the magnifying power of the telescope for viewing distant object in normal adjustment? If this telescope is used to view a 100 m tall Also tower 3 km away, what is the height of the image of the tower formed by the objective lens?

Assume that light of wavelength 6000A is coming from a star. What is the limit of resolution of a telescope whose objective has a diameter of 100 inch?

Assume that light of wavelength 600 Å is coming from a star. What is the limit of resolution of telescope whose objective has a diameter of 100 inch?

A Galilean telescope is constructed by an objective of focal length 50 cm and a eyepiece of focal length 5.0 cm a. find the tube length and magnifying power when it is used to see n object at a large distancei normal adjustment b. if the telescope is to focus an object 2.0 m away from the objective what should be the tube length and angular magnification, the image again forming at infinity?

b. If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens ? the diameter of the moon is 3.48 xx 10^(6) m , and the radius of lunar orbit is 3.8 xx10^(8) m.

An optical instrument used for angular magnification has a 25 D objective and a 20D eyepiece. The tube length is 25 cm when the eye is least strained . Whether it is a microscope or a telescope?

A telescope has an objective of diameter 60 cm.The focal lengths of the objective and eyepiece are 2.0 m and 1.0 cm respectively. The telescope is directed to view two distant almost point sources of light, (e.g., two stars of a binary) The sources are roughly at the same distance = ( =10^4 light year) along the line of sight but are separated transverse to the line of sight by a distance of 10^10 m. Will the telescope resolve the two objects i.e. will it see two distant stars?