What is the light intensity on a wall 3m

Reference no: EM1344915

Q. A 100 W light bulb produces 4W of visible light.

(a) What is the light intensity on a wall 3m away from the light bulb?
(b) Where did the 96 W go?
(c) A krypton laser produces a cylindrical red laser beam 3mm in diameter with 4W of power.
What is the light intensity on a wall 5.0 m away from the laser?

Reference no: EM1344915

Questions Cloud

Find the firms after-tax cost of debt on the bond : Belton is issuing a 1,000 dollar par value bond that pays 7% yearly interest and matures in 15 years. Investors are willing to pay $958 for the bond.

C program to accept three numbers inputs by user : Write down C program to accept three numbers input by a user, and outputs a table of temperatures in Fahrenheit, Celsius, and Kelvin.

What is the spring constant of the spring : A 60 kg person drops from rest a distance of 1.20m to a platform of negligible mass supported by a stiff spring. The platform drops 6cm before the person comes to rest.

Explaining steps to execute branch instruction : Sketch a flow chart which carefully explains steps that little man follows to execute a branch instruction.

What is the light intensity on a wall 3m : A krypton laser produces a cylindrical red laser beam 3mm in diameter with 4W of power. What is the light intensity on a wall 5.0 m away from the laser.

Explain vpn works : Explain ciphertext and describe how you would test a piece of ciphertext to estimate quickly if it was likely the result of transposition?

Explain how much of current unemployment can be attribute : explain how much of the current unemployment can be attributed to cyclical factors.

How tall is the top of castle wall : King Arthur's knights fire cannon from the top of the castle wall. The cannonball is fired at a speed of 60 m/s and an angle of 33. A cannonball that was accidentally dropped from the top of the castle wall hit the moat below in 1.80s.

How much work is necessary to put the bag on a shelf : A cable is used to raise a 29kg urn from an underwater archeological site. There is a 21 N drag force from the water as the urn is raised at a constant speed.

User Account

All Pages