Frank ICSE Solutions for Class 9 Physics - Sound: Range of Hearing PAGE NO: 284 Solution 1: The frequency of sound is defined as the number of vibrations produced by the sound producing object per second.Solution 2: S.I unit of frequency is hertz.Solution 3: One hertz is defined as one vibration produced in one second by sound producing object.Solution 4: The … [Read more...] about Frank ICSE Solutions for Class 9 Physics – Sound: Range of Hearing
Frank ICSE Physics
Frank ICSE Solutions for Class 9 Physics – Sound: Production and Propagation of Sound
Frank ICSE Solutions for Class 9 Physics - Sound: Production and Propagation of Sound PAGE NO: 278 Solution 1: Yes, Sound is form of energy.Solution 2: Sound is produced by the vibrating objects.Solution 3: No, sound cannot travel through vacuum.Solution 4: Yes, sound can propagate through solids and liquids.Solution 5: No, sound cannot be produced in … [Read more...] about Frank ICSE Solutions for Class 9 Physics – Sound: Production and Propagation of Sound
Frank ICSE Solutions for Class 9 Physics – Light
Frank ICSE Solutions for Class 9 Physics - Light PAGE NO: 261 Solution 1: Convex mirror has a wider field of view.Solution 2: Convex mirror always produces an erect image of the object.Solution 3: Convex mirror is used in vehicles to see the traffic on rear side.Solution 4: We will use convex mirror to see an enlarged image of our face.Solution 5: Image … [Read more...] about Frank ICSE Solutions for Class 9 Physics – Light
Frank ICSE Solutions for Class 9 Physics – Light: Spherical Mirrors
Frank ICSE Solutions for Class 9 Physics - Light: Spherical Mirrors PAGE NO: 258 Solution 1: A spherical mirror is a part of a hollow glass sphere silvered on one side.Solution 2:Solution 3: Focal length = 1/2 of radius of curvature = 1/2 x 30 = 15cm.Solution 4: Focal point is the principal focus of the mirror where a parallel beam of light meets(or appear … [Read more...] about Frank ICSE Solutions for Class 9 Physics – Light: Spherical Mirrors
Frank ICSE Solutions for Class 9 Physics – Light: Reflection of Light
Frank ICSE Solutions for Class 9 Physics - Light: Reflection of Light PAGE NO: 245 Solution 1: Light may be defined as the radiant energy which produces in us the sensation of sight. Light itself is invisible but makes other objects visible.Solution 2: Yes, light is a form of energy that produces the sensation of vision in our eyes.Solution 3: The velocity of light … [Read more...] about Frank ICSE Solutions for Class 9 Physics – Light: Reflection of Light