Which of the following characteristics of light determines its colour?
A. velocity B. wavelength C. amplitude D. intensity Correct Answer: Option B B. wavelengthA thin lens is placed 50cm from an illustrated object. The image produced has a linear magnification of 14. Calculate the power of the lens in dioptres
A. 2.5D B. 5.0D C. 10.0D D. 25.0D Correct Answer: Option C C. 10.0D Explanation 1/v=1/u m = v/u=14=v/50 v = 12.5 But 1/v+1/u=1/f = 1/50+1/12.5 = 1/f f = 10m P = 100/10=10DA concave mirror forms a magnified and erect image only when the object is placed?
A. at the centre of curvature B. at the focus C. between the focus and the pole of the mirror D. beyond the radius of curvature Correct Answer: Option C C. between the focus and the pole of the mirrorThe angle of incidence of a ray of light on a plane mirror is 55°. Determine the angle between the reflected ray and the mirror?
A. 35° B. 45° C. 55° D. 110° Correct Answer: Option A A. 35°Products
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