SSC Government Jobs Exams General Ability General Knowledge

A concave mirror is placed on a horizontal table,
with its axis directed vertically upwards. Let O
be the pole of the mirror and C its centre of
curvature. A point object is placed at C. It has a
real image, also located at C. If the mirror is now
filled with water, the image will b

(A) real and will remain at C
(B) real and located at a point between C and infinity
(C) virtual and located at a point between C and O
(D) real and located at a point between C and O.

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SSC Other Question
Speed of a boat in standing water is 14 kmph and the speed of the stream is 1.2 kmph. A man rows to a place at a distance of 4864 km and comes back to the starting point. The total time taken by him is:

Options
1) 700 hours
2) 350 hours
3) 1400 hours
4) 1010 hours When a parallel white light falls on a convex
lens, the colour meeting the axis close to the
optical axis will be -
(A) Red
(B) Blue
(C) Violet
(D) All at the same point