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Fill in the Blanks 1. Light shows the phenomena of reflection, refraction and ………. . 2. The speed of light in vacuum is ………. . 3. Power of’ a lens is the ………. of its focal length. 4. The SI unit of power is ………. . 5. A ………. lens will always give a virtual, erect and diminished image, irrespective of the position of the object. 6. A positive sign in the value of magnification indicates that the image is ………. . 7. A ………. mirror is used as a head mirror by the doctors to concentrate light on the body parts to be examined. 8. No matter how far you stand from a spherical mirror, your image appears erect. The mirror may be ………. .

Fill in the Blanks

1. Light shows the phenomena of reflection, refraction and ………. .
2. The speed of light in vacuum is ………. .
3. Power of’ a lens is the ………. of its focal length.
4. The SI unit of power is ………. .
5. A ………. lens will always give a virtual, erect and diminished image, irrespective of the position of the object.
6. A positive sign in the value of magnification indicates that the image is ………. .
7. A ………. mirror is used as a head mirror by the doctors to concentrate light on the body parts to be examined.
8. No matter how far you stand from a spherical mirror, your image appears erect. The mirror may be ………. .

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8741 Points
26 days ago
Answers 1. dispersion 2. 3 x 108 m/s 3. reciprocal 4. dioptre 5. concave 6. virtual 7. concave 8. plane or convex mirror .

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