Tag: what makes things visible
Questions Related to what makes things visible
It is necessary to illuminate the bottom of a well by reflected solar beam when the light is incident at an angle $40^o$ to the vertical. At what angle to the horizontal should a plane mirror be placed?
An invisible energy which causes in us the sensation vision, is
The illumination on the screen, in case of a movie hall if the distance between the projector and the screen is increased by $1\%$ will be:
Pick the only wrong statement in the following :
A broader bundle of light rays is called a -
What is the wavelength range of visible light?
In a YDSE with two identical slits, when the upper slit is covered with a thin, perfectly transparent sheet of mica, the intensity at the centre of screen reduces to $75\%$ of the initial value. Second minima is observed to be above this point and third maxima below it. Which of the following can be a possible value of phase difference caused by the mica sheet.
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