Physics Practice Tests – Reflection of Light Waves

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The angle of incidence of a ray on a plane mirror is 55o. Determine the angle between the reflected ray and the mirror.

A. 35 o B. 45 o C. 55 o D. 110 o

Which of the following observations cannot be explained using the rectilinear propagation of light?

A. Production of images by a pinhole camera
B. Production of real images of objects by lenses
C. Formation of an annular eclipse
D. Diffraction patterns of light.

An object is placed in front of a concave mirror of radius of curvature 12 cm. If the height of the real image formed is three-times that of the object, calculate the distance of the object from the mirror

A. 24 cm    B. 16 cm   C. 12cm   D. 8 cm

A converging lens produces an image four times as large as an object placed 25cm from the lens. Calculate its focal length.

A. 100 cm    B. 33 cm    C. 29 cm    D. 20 cm

Which of the following is true for the image formed by a convex mirror?

I. The image is always virtual
II. The image is always erect
III. The image lies between pole, and focus
IV. The image ¡s never magnified
V. The focal length is negative

A. I only
B. I and II only
C. II and III only
D. I, II, III and IV only

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