EASY
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How can you find the focal length of a convex mirror?

Important Questions on Light Energy

EASY
Define the radius of curvature of a spherical mirror.
MEDIUM

The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image?

MEDIUM

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Which of the following statements is not true in reference to the diagram shown above?

EASY
Define the centre of curvature of the spherical mirror?
EASY

A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.

Which type of mirror does he have?

EASY
Define the principal focus of a concave mirror.
HARD

An object of height 4 cm is kept at a distance of 30 cm from the pole of a diverging mirror. If the focal length of the mirror is 10 cm, the height of the image formed is ____.

EASY
The distance between pole and principal focus of a spherical mirror is called
EASY
If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a labelled ray diagram to support your answer. 
MEDIUM

In which of the following is a concave mirror is used?

EASY
Define the focal length of a spherical mirror.
EASY
A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.

What should he do to burn the paper?

MEDIUM

What will be the angle of incidence when a ray of light passes through the centre of curvature of a concave mirror?

EASY
Does focal length of a spherical mirror changes when it is completely immersed in water? Predict and write the reason.
EASY
Define the radius of curvature of the spherical mirror.
EASY
A spherical mirror and a thin spherical lens each of focal length -10 cm are given. The mirror and lens are likely to be:
EASY

What is meant by the pole of a spherical mirror?

MEDIUM

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For the diagram shown, according to the new Cartesian sign convention the magnification of the image formed will have the following specifications.

MEDIUM

A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.

Will he be able to determine the approximate value of focal length of this mirror from this activity ? Give reason and draw ray diagram to justify your answer in this case.

EASY
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is: