An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror:
-4.1 cm
-8.2 cm
-9.9 cm
-20 cm
If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:
Refract only
Reflect only
Partially refract and partially reflect
Diffract only
The index of refraction depends on:
The focal length
The speed of light
The image distance
The object distance
The distance between principal focus and pole of mirror is called:
Principal focus
Focal length
Aperture
Image
