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Form 2 Physics: Reflection at curved surfaces questions and answers
Explain with the aid of a labeled ray diagram the wide field of view of a convex mirror.
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1.
Explain with the aid of a labeled ray diagram the wide field of view of a convex mirror.
2.
A lady holds a large concave of focal length 1m, 80cm from her face. State two characteristics of her image in the mirror.
3.
Fig 9 show two parallel rays incident on a concave mirror. F is the focal point of the mirror. Sketch on the same diagram the path of the rays after striking the mirror.
4.
Fig 12 shows a ray of light incident on a convex mirror. Using a suitable construction on the same diagram, determine the radius of the curvature of the mirror.
5.
(a) (i) State one application of each of the following (I) Convex mirror (II) Parabolic mirror (ii) Fig 1 which is drawn to a scale of 1:5 represents an object O and its image I formed by a concave mirror. By drawing suitable rays, locate and mark on the figure the position of the principal focus, F of the mirror. Determine the focal length f (b) The graph in figure 2 shows the variation of
6.
Figure 13 shows a point object O placed in front of a concave mirror. Draw appropriate rays to locate the image of the object.
7.
Figure 16 (a) and (b) shows a convex mirror and a plane of equal aperture. By sketching a pair of incident and reflected rays for each (a) and (b) show how the convex mirror provides to the eye, a wider field of view than the plane mirror.
8.
Figure 12 show a parabolic surface with a source of light placed at its focal point F. Draw rays to show reflection from the surface when rays from the source strike the surface at points A, B, C and D.
9.
Figure 12 shows a vertical object O placed in front of a concave mirror. On the same diagram draw the appropriate rays and locate the image formed.
10.
Figure 8 shows an object placed in front of a concave mirror of focal length 10cm. C is the centre of curvature. (i) On the same figure draw the ray diagram showing the location of the image. Use the ray diagram drawn in (i) to determine the: (ii) Image distance (iii) The magnification
11.
Figure 3 shows an object O in front of a concave mirror and its image I formed after reflection. (a) On the same diagram draw appropriate ray(s) to locate the principal focus, F of the mirror. (b) Determine the focal length of the mirror ( scale1:5)
12.
Figure 4 shows a bright electric lamp placed behind a screen which has a hole covered with a wire gauze. A concave mirror of focal length 25cm is placed in front of the screen. The position of the mirror is adjusted until a sharp image of the gauze is formed on the screen. Determine the distance between the mirror and the screen.
13.
(a) Figure 17 shows an object O placed in front of a converging mirror of focal length 15cm Draw on the figure a ray diagram to locate the image formed. (b) State why parabolic reflectors are used in car headlights.
14.
Figure 2 shows the image of an object formed by reflection in a converging mirror. C is the centre of curvature of the mirror. Complete the diagram to show: (a) How incident rays are reflected to form the image. (b) The object position.
15.
Figure 2 shows circular waves originating from the principal focus F of a concave mirror and moving towards the mirror. Complete the diagram to show the reflected waves.
16.
Figure 11 shows an object placed 10cm in front of a concave mirror whose radius of curvature is 40cm. (i) On the same figure, draw a ray diagram to show the position of the image formed (ii) Use the ray diagram to determine: (I) The image distance (II) The magnification (iii) State where the position of the image would be if the object had been placed at the principal focus.
17.
State the reason why a convex mirror is preferred over a plane mirror for use as a driving mirror.
18.
State two advantages of using convex mirrors to monitor movements in a large supermarkets.
19.
Figure 2 shows the image of an object O placed on the principal axis of a convex mirror. On the figure, draw a ray diagram to locate the object.
20.
State the disadvantage of using a convex mirror as a driving mirror.
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