Physics
Assertion (A) : A concave mirror can form both real and virtual images.
Reason (R) : The type of image formed by a concave mirror depends on the position of the object relative to the mirror's focal 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 true but reason is false
- Assertion is false but reason is true
Reflection of Light
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Answer
Both A and R are true and R is the correct explanation of A
Explanation
Assertion (A) is true because a concave mirror forms real as well as virtual images depending on the position of the object relative to the mirror's focal point.
Reason (R) is true because a concave mirror forms real and virtual images such that if the image is virtual then the object is very close to the mirror before its focus and if the image is real then the object is at focus or beyond it.
So, here reason clearly explains the assertion that concave mirror forms real and virtual images depending on the position of the object relative to the mirror's focal point.
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Related Questions
Assertion (A) : If a white light is passed through a prism, it splits into different colours.
Reason (R) : White light is a mixture of colours.
- 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 true but reason is false
- Assertion is false but reason is true
Assertion (A) : The bottom of a pond appears shallower than its actual depth.
Reason (R) : Light rays from the bottom of the pond bend towards the normal as they pass from water to air.
- 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 true but reason is false
- Assertion is false but reason is true
Assertion (A) : Convex mirrors are used as a vigilance mirror.
Reason (R) : Convex mirrors form magnified images.
- 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 true but reason is false
- Assertion is false but reason is true
Fill in the blanks:
(a) Water is optically …………… than air.
(b) Air is optically …………… than glass.
(c) When a ray of light travels from water to air, it bends …………… the normal.
(d) When a ray of light travels from air to glass, it bends …………… the normal.
(e) Refractive index of water is 4/3, so the apparent depth is …………… of the real depth.
(f) The splitting of white light into its constituent colours is called …………… .
(g) A …………… mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
(h) Radius of curvature of a spherical mirror is …………… its focal length.
(i) The angle of incidence for a ray of light passing through the centre of curvature of a spherical mirror is …………… .
(j) A …………… mirror always forms a virtual image.
(k) A concave mirror forms a virtual image for an object placed …………… .