Geometrical OpticsEasy
Question
A student performing experiment using optical bench observes that when concave mirror is at zero, and tip of object needle is at 10 cm from the pole of the mirror, the fixture of object needle mark reads x cm, and it′s image appears to cover the whole aperture of the mirror. Now, when the object needle is moved to y cm, it′s inverted image coincides with it and parallax is removed, then the bench correction (index correction) can be expressed as (Given bench error is positive for object needle)
(i) x - 10 (ii) y -20 (iii) x + 10 (iv) y + 20
Choose the CORRECT option
(i) x - 10 (ii) y -20 (iii) x + 10 (iv) y + 20
Choose the CORRECT option
Options
A.(i) and (ii
B.(ii) and (iii)
C.(i) and (iv)
D.(iii) and (iv)
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