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प्रश्न
State four uses of a plane mirror.
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उत्तर
Four uses of plane mirror are:
- Plane mirrors are used in the construction of reflecting periscope.
- They are used as looking glass.
- They are used in solar cookers for reflecting the rays of the sun into the cooker.
- They are used for signaling purposes.
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संबंधित प्रश्न
State the characteristics of the image formed by a plane mirror.
Write true or false of the following statement.
The image formed by a plane mirror is real
Select the correct alternative
The property due to which a light ray striking a surface is returned back into the same medium is called
Explain the following term:
Reflected ray. Draw diagram/diagrams to show them.
A ray is incident on a plane mirror . Its reflected ray is perpandicular to the incident ray . Find the angle of incidence .
An object 3 cm high produces a real image 4.5 cm high when placed at a distance of 20 cm from a concave mirror. Calculate:
- the position of image
- focal length of the concave mirror.
Out of the following, choose the substance which is translucent medium:
Reflection occurs , when the light
A light ray enters from medium A to medium B as shown in Figure 10.2. The refractive index of medium B relative to A will be
