Question

When sun rays reches the earth it brings heat with it.but when rays from the sun comes to moon ,the moon didnt give heat .why?

Answer 1

because moon absorb the heat and gives light !!

Answer 2

HEY.MATE,
is. We just can't feel it.

I invite you to do a small experiment. 
Look towards a full moon, on a cloudless night. What do you experience? 
Now look to the sun on a bright day. How painful is it?

The sun emits an extreme amount of energy as light into space, enough energy for it to lose mass at a rate of multiple thousand kilograms - per second. 
Most of this energy/light will be lost in space. However, a fraction of this energy - about 0,00000005%, or the spatial angle of the earth from the sun - will hit the earth and burn your retina. 
The moon also experiences such a small fraction of the sun's energy, and diffracts a good deal of the light back into space.
However, most of that diffracted energy will be lost in space as well, as the spatial angle of the earth from the moon is extremely small as well.

So because the light has to be extremely lucky twice instead of just once, the intensity of moonlight is far lower than the intensity of sunlight.

This means moonlight doesn't have as much energy as sunlight, not even enough energy to warm the earth more than a fraction of a degree.

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