Fill in the Blanks1. 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 ………. .

Harshit Singh , 3 Years ago

Grade 12th pass