Physics
Assertion (A) : For an object placed symmetrically when the angle θ between the mirrors is 72°, the number of images formed is 4.
Reason (R) : If n = 360°/θ is odd, the number of images for an object placed symmetrically is equal to n.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Related Questions
Assertion (A) : The image of an object placed close to a concave mirror is a real image.
Reason (R) : A real image is formed due to the actual intersection of the reflected rays.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : For a real image formed by a spherical mirror, linear magnification (m) is positive.
Reason (R) : Both u and v are negative for a real image.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : Concave mirror is used as doctor's head mirror.
Reason (R) : If a parallel beam of light is incident on a concave mirror, the mirror focuses the beam to a point.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : A student is given a spherical mirror of focal length -10 cm. He identifies it as a concave mirror.
Reason (R) : Focal length of a concave mirror is always positive.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false