Light – Reflection and Refraction
- A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal The ray of light bends towards the normal. When a ray of light enters from an optically rarer medium (having low refractive index) to an opt... 1
- A concave mirror produces three times magnified (enlarged) real image of object placed at 10 cm in front of it. The magnification(m) is given as = -3 (as image is real) object distance(u) = -10 cm image distance (v)=? we know that m= -v/u -3 = -v /-10... 1
- Find the focal length of a convex mirror whose radius of curvature is 32 cm. Radius of curvature, R= 32 cm Radius of curvature = 2 × Focal length (f) R= 2ff= R/2 = 32/2 = 16 Hence, the focal length of the given convex... 1
- Why do we prefer a convex mirror as a rear-view mirror in vehicles? We prefer a convex mirror as a rear-view mirror in vehicles because it gives a wider field of view, which allows the driver to see most of t... 1
- Name the mirror that can give an erect and enlarged image of an object. Concave Mirror 2
- The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Radius of curvature, R= 20 cm Radius of curvature of a spherical mirror = 2 × Focal length (f)R= 2f f= R/2 = 20 / 2 = 10 Hence, the focal le... 1
- Define the principal focus of a concave mirror. Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting f... 1