Physics
If temperature of medium increases, then critical angle
- decreases
- increases
- zero
- first increases then decreases
Related Questions
Assertion A ray of light passing through the centre of curvature of a concave mirror is reflected back along the same path.
Reason The incident ray, the reflected ray and the normal at the point of incidence lie on the same plane.
- Both Assertion and Reason are true.
- Both Assertion and Reason are false.
- Assertion is false but Reason is true.
- Assertion is true but Reason is false.
The focal length does not depend on
- refractive index
- radius of curvature
- direction of light
- None of the above
If current through a resistance is doubled and its resistance made one-fourth, then the value of power dissipation will
- remain same
- double
- become 4 times
- become 1⁄4 time