1)Concave and _are two types of curved mirrors
 Concave lens
Plane Mirror
 Convex lens
Convex Mirror✓✓✓

2) Focusing the image of a distant window on to a sheet of paper gives the ………….. Of a concave mirror.
 Approximate radius of Curvature
  Focal Length
 Approximate Focal Length✓✓✓
Radius of Curvature

3) One of the following is an Optical instrument.
Ammeter
Prism✓✓✓
 Resistor
Stirrer

4) _ is used to deduce the focal length of the lens
Mirror formular
Radius Formular
Lens Formular✓✓✓
Radius equations

5): To verify the refractive of a glass block, Two angles are important - angle of incidence and
 Diffraction
Refraction✓✓✓
Emergent angle
Reflection

6)7. The ratio of speed of light in Vacuum to the speed in a given material is called
Refractive Index✓✓✓
Reflection index
Index of reflection
Deviation index

7) __ relates the focal length of the mirror, object distance and image distance.
Newton Formular
Spherical Equation
Optical equation
Mirror formular✓✓✓

8) __ mirror is silvered in its outer side.
Spherical
Plane
Concave✓✓✓
Convex

9) Silver Coating is done in the inside of
Concave lens
Concave Mirror
Convex Mirror✓✓✓
Convex lens

10) 1. _ Is twice the focal length
Radius of Curvature✓✓✓
Pole
Lenghth of curvature
Principal focus