True, Reflection occurs when light strikes a mirror., Reflection is the bouncing of light from a smooth surface., Highly polished surfaces are good reflectors of light., A transparent substance allows all the light to pass through and does not reflect any light., Any smooth polished surface which can reflect most of the light incident on it is called mirror., The angle between the incident ray and the normal is called the angle of incidence., The light ray that bounces off from the surface of the mirror is known as the reflected ray., Normal is a line perpendicular to the mirror surface where the reflection occurs., According to the laws of reflection the angle of incidence is equal to angle of reflection., The laws of reflection are valid even when the incident and the reflected rays are reversed., According to the laws of reflection the incident ray, the reflected ray and the normal all lie in a same plane., Reflection in a plane mirror is an example of regular reflection., Regular reflection is also known as specular reflection., The brightness of an object depends on the intensity of the incident light and also on the reflectivity of the object., In the case of diffuse reflection, no definite image is formed., The image formed by a plane mirror is of the same size as that of the object., Unlike a pinhole camera, a plane mirror forms virtual image., The phenomenon in which the left side of an object appears to be the right side in the image formed by a plane mirror and vice versa is known as lateral inversion., Soldiers use plane mirrors for signaling., A reflecting telescope is an optical telescope that uses a combination of curved and plane mirrors to reflect light and form an image., A periscope is a device used to see objects which are not in the direct line of sight., False, Reflection of light does not depend upon the nature of object on which it falls., An opaque object absorbs most of the incident light and reflects only a little, All substances absorb some incident light and reflect the rest., A ray of light incident normally on a plane mirror sometimes retraces its path., Plane mirror is a poor reflector., The angle of incidence is not the angle between the incident ray and the normal, According to the laws of reflection the rays of light are irreversible., Scratched mirror and rippling water are not examples of diffuse reflection., The reflection from the surface of a plane mirror is irregular reflection, The image formed by a plane mirror is real., Real image cannot be obtained on a screen., Not all plane mirrors show lateral inversion., Curved mirrors are used in solar cookers., Telescopes are used by soldiers hiding in trenches to see above the ground.

PHY707 True/False

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