Physics
Planets are

luminous heavenly bodies that do not twinkle
luminous heavenly bodies that twinkle
luminous heavenly bodies revolving around a star
non-luminous heavenly bodies

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Physics
Which one of the following is the correct sequence of passage of light in a compound microscope?

Condenser -Objective lens -Body tube -Eyepiece
Eyepiece -Objective lens -Body tube -Mirror
Condenser -Objective lens -Eye -piece -Body tube
Objective lens -Condenser -Body tube -Eye piece

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