Lakhmir Singh - Class 10 Physics Chapter 4 all questions
Answers
Question 1
What happens when a ray of light normally (or perpendicularly) on the surface of a plane mirror?
Solution 1
As ray of light falls normally on mirror, this means that angle of incidence is 0o. From second law of reflection, we know that angle of incidence is equal to angle of reflection. So, angle of reflection will also be zero. Therefore, the light ray will be reflected back along the same path.
Question 2
"(a) A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where.....
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"(a) Explain why, though both a plane mirror and a sheet of paper reflect li.....
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"(a) An extended object in the form of an arrow pointing upward has been pla.....
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"The figure given alongside shows the image of a clock as seen a plane mirro.....
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"A man sits in an optician's chair looking into plane mirror which is 2 m aw.....
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"(a) What is meant by (i) principal focus of a convex mirror, and (ii) focal.....
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"(a) Define (i) principal focus of a concave mirror, and (ii) focal length o.....
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"A communications satellite in orbit sends a parallel beam of signals down t.....
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"When a spherical mirror is held towards the sun and its sharp image is form.....
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"Draw the following diagram in your answer book and show the formation of im.....
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"Draw the following diagram in your answer book and show the formation of im.....
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"Describe with the help of a diagram, the nature, size and position of the i.....
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"(a) Give two circumstances in which a concave mirror can form a magnified i.....
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"Describe the New Cartesian Sign Convention used in optics. Draw a labelled .....
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"What is the nature of image formed by a concave mirror if the magnification.....
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"A concave mirror produces a real image 1 cm tall of an object 2.5 mm tall p.....
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"Fill in the following blanks with suitable words
(a) If the magnification h.....
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"A man holds a spherical shaving mirror of radius of curvature 60 cm, and fo.....
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"In order to obtain a magnification of −2 (minus 2) with a concave mirror, t.....
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"A concave mirror produces magnification of +4. The object is placed
(a) at .....
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"If a magnification of, −1 (minus one) is to be obtained by using a convergi.....
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"In order to obtain a magnification of, −0.6 (minus 0.6) with a concave mirr.....
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"In order to obtain a magnification of, −1.5 with a concave mirror of focal .....
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"Linear magnification (m) produced by a rear view mirror fitted in vehicles
.....
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"Name the spherical mirror which can produce a real and diminished image of .....
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"Name the spherical mirror which can produce a virtual and diminished image .....
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"Where would the image be formed by a convex mirror if the object is placed
.....
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"Give two uses of a convex mirror. Explain why you would choose convex mirro.....
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"What would your image look like if you stood close to a large
(a) convex mi.....
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"(a) Draw a labelled ray diagram to show the formation of image of an object.....
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"(a) Draw a labelled ray diagram to show the formation of image in a convex-.....
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"The diagrams show the appearance of a fork when placed in front of and clos.....
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"An object is placed at a distance of 10 cm from a convex mirror of focal le.....
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"A shop security mirror 5.0 m from certain items displayed in the shop produ.....
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"An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm.....
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