What is the light intensity on a wall

Reference no: EM13313039

A 100 W lightbulb produces 4.0 W of visible light.

(a) What is the light intensity on a wall 3.0 m away from the lightbulb?

(b) Where did the 96 W go?

(c) A krypton laser produces a cylindrical red laser beam 3.0 mm in diameter with 4.0 W of power. What is the light intensity on a wall 5.0 m away from the laser?

Reference no: EM13313039

Questions Cloud

Professional context must create negative messages : Sometimes, people writing in a professional context must create negative messages, such as a letter of termination, a press release regarding a company error, a denial of a claim, or a poor performance review. When you write such a negative message, ..

What would be the minimum angle of the wooden bar with floor : A 2inx4inx8ft is leaning against the wall, draw afree-body diagram of forces on it. what would be the minimum angle of the wooden bar with the floor

Find the electrical field at a point between the two charges : two point charges are seperated by 10.0 cm and have charges of +2.00uc, What is the electrical field at a point between the two charges

Determine linear velocity of the wastewater in the pipe : A wastewater treatment plant must disinfect its effluent before discharging the waste water to a near-by stream. The wastewater contains 4.5x10^5 fecal coliform colony-forming units (CFU) per liter.

What is the light intensity on a wall : A 100 W lightbulb produces 4.0 W of visible light. What is the light intensity on a wall 3.0 m away from the lightbulb

Create a clustered index on the groupid column : Write the CREATE INDEX statements to create a clustered index on the GroupID column and a nonclustered index on the IndividuallD column of the GroupMembership table.

Calculate the induced emf in the coil : A 28-turn circular coil of radius 4.20 cm and resistance 1.00 %u03A9 is placed in a magnetic field directed perpendicular to the plane of the coil. Calculate the induced emf in the coil at t = 5.80 s

Determine how much the thickness of the dnapl layer has : Determine how much the thickness of the DNAPL layer has to build up with similar capillary characteristics but 1.08 g/cm3 density to migrate through a bed of fine sand of 0.5 mm diameter.

Determine the maximum emf in the alternator : In a 290-turn automobile alternator, the magnetic flux in each turn is %u03A6B = 2.50 10-4 cos %u03C9t, Determine the maximum emf in the alternator

User Account

All Pages