An angular magnification of 30X is desired using an objective of focal

1.	An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?
Answer» m_e = 1 + 25/5 = 6 m_o = 30 / m_e = 5 m_o = v_o / -u_ov_o = - 5 u_o 1/f_o = 1/v_o – 1/u_of_o= - (5/6) u_o u_o = 1.5 cm , v_o = 7.5 cm u_e= - 4.17 cm Length of the tube = u_e + v_o = 11.67 cm

An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?

Answer»

m_e = 1 + 25/5 = 6

m_o = 30 / m_e = 5

m_o = v_o / -u_ov_o = - 5 u_o

1/f_o = 1/v_o – 1/u_of_o= - (5/6) u_o

u_o = 1.5 cm , v_o = 7.5 cm

u_e= - 4.17 cm

Length of the tube = u_e + v_o = 11.67 cm

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An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?

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