The image of a pin formed by a diverging lens of focal length 10cm is 5cm from the lens. Calculate the distance of the pin from the lens
A. -3.3cm B. 3.3cm C. 10.0cm D. 15.0cm E. 20.0cm Correct Answer: Option B – 3.3cm Explanation 1/u – 1/v = 1/f; f = 10cm, v = 5cm u = 10/3 = 3.3cmWhich of the following statements is not correct for a light ray passing through a rectangular glass block which is surrounded by air? It
A. suffers a displacement at the point of emergence B. emerges parallel to the incident ray C. is partly reflected at the point of incidence D. is deviated at the point of emergence E. is reflected in the block Correct Answer: Option A – suffers a displacement...
Images formed by a convex mirror are always _____?
A. inverted, real and diminished B. inverted, virtual and diminished C. erect, virtual and diminished D. erect, real and magnified E. erect, virtual and magnified Correct Answer: Option C – erect, virtual and...
A ray of light strikes a plane mirror at an angle of incidence (i). Determine in terms of (i) the angle of deviation of the ray after reflection from the mirror.
A. i B. 2i C. 90° − i D. 90° + i E. 180° − 2i Correct Answer: Option E = 180° − 2i
Which of the following instruments is used to measure relative humidity?
A. Hydrometer B. Barometer C. Manometer D. Hypsometer E. Hygrometer Correct Answer: Option E – HygrometerProducts
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