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प्रश्न
Reflection occurs , when the light
पर्याय
about to reach a surface
approaches a surface
passes through a surface
None of these
उत्तर
approaches a surface
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संबंधित प्रश्न
Draw a figure describing the following.
The reflecting surface of two mirrors make an angle of 90∘ with each other. If a ray incident of one mirror has an angle of incidents of 30∘, draw the ray reflected from the second mirror. What will be its angle of reflection?
Figure shows an incident ray AO and the normal ON on a plane mirror. The angle which the incident ray AO makes with mirror is 30°. (a) Find the angle of incidence. (b) Draw the reflected ray and then find the angle between the incident and reflected rays.
State two advantages and two disadvantages of the reflecting periscope.
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.
The word PLATE written on a paper is held in front of a plane mirror. Write down the letters as seen in the following case.
The paper is held parallel to the mirror.
Locate the image termed when the object is placed between two planes as shown in the following figure.
By geometrical construction, find the position of the image in the following figure.
Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.
Total internal reflection will occur if the angle of reflection is ______.
The angle of incidence is equal to the angle of reflection for perfect reflection.
